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| 7 | DistributedCache (Hadoop 0.20.1 API) |
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| 87 | <HR> |
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| 88 | <!-- ======== START OF CLASS DATA ======== --> |
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| 89 | <H2> |
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| 90 | <FONT SIZE="-1"> |
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| 91 | org.apache.hadoop.filecache</FONT> |
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| 92 | <BR> |
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| 93 | Class DistributedCache</H2> |
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| 94 | <PRE> |
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| 95 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> |
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| 96 | <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.filecache.DistributedCache</B> |
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| 97 | </PRE> |
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| 98 | <HR> |
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| 99 | <DL> |
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| 100 | <DT><PRE>public class <B>DistributedCache</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL> |
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| 101 | </PRE> |
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| 102 | |
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| 103 | <P> |
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| 104 | Distribute application-specific large, read-only files efficiently. |
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| 105 | |
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| 106 | <p><code>DistributedCache</code> is a facility provided by the Map-Reduce |
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| 107 | framework to cache files (text, archives, jars etc.) needed by applications. |
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| 108 | </p> |
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| 109 | |
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| 110 | <p>Applications specify the files, via urls (hdfs:// or http://) to be cached |
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| 111 | via the <A HREF="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred"><CODE>JobConf</CODE></A>. |
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| 112 | The <code>DistributedCache</code> assumes that the |
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| 113 | files specified via hdfs:// urls are already present on the |
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| 114 | <A HREF="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><CODE>FileSystem</CODE></A> at the path specified by the url.</p> |
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| 115 | |
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| 116 | <p>The framework will copy the necessary files on to the slave node before |
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| 117 | any tasks for the job are executed on that node. Its efficiency stems from |
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| 118 | the fact that the files are only copied once per job and the ability to |
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| 119 | cache archives which are un-archived on the slaves.</p> |
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| 120 | |
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| 121 | <p><code>DistributedCache</code> can be used to distribute simple, read-only |
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| 122 | data/text files and/or more complex types such as archives, jars etc. |
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| 123 | Archives (zip, tar and tgz/tar.gz files) are un-archived at the slave nodes. |
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| 124 | Jars may be optionally added to the classpath of the tasks, a rudimentary |
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| 125 | software distribution mechanism. Files have execution permissions. |
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| 126 | Optionally users can also direct it to symlink the distributed cache file(s) |
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| 127 | into the working directory of the task.</p> |
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| 128 | |
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| 129 | <p><code>DistributedCache</code> tracks modification timestamps of the cache |
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| 130 | files. Clearly the cache files should not be modified by the application |
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| 131 | or externally while the job is executing.</p> |
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| 132 | |
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| 133 | <p>Here is an illustrative example on how to use the |
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| 134 | <code>DistributedCache</code>:</p> |
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| 135 | <p><blockquote><pre> |
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| 136 | // Setting up the cache for the application |
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| 137 | |
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| 138 | 1. Copy the requisite files to the <code>FileSystem</code>: |
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| 139 | |
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| 140 | $ bin/hadoop fs -copyFromLocal lookup.dat /myapp/lookup.dat |
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| 141 | $ bin/hadoop fs -copyFromLocal map.zip /myapp/map.zip |
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| 142 | $ bin/hadoop fs -copyFromLocal mylib.jar /myapp/mylib.jar |
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| 143 | $ bin/hadoop fs -copyFromLocal mytar.tar /myapp/mytar.tar |
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| 144 | $ bin/hadoop fs -copyFromLocal mytgz.tgz /myapp/mytgz.tgz |
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| 145 | $ bin/hadoop fs -copyFromLocal mytargz.tar.gz /myapp/mytargz.tar.gz |
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| 146 | |
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| 147 | 2. Setup the application's <code>JobConf</code>: |
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| 148 | |
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| 149 | JobConf job = new JobConf(); |
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| 150 | DistributedCache.addCacheFile(new URI("/myapp/lookup.dat#lookup.dat"), |
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| 151 | job); |
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| 152 | DistributedCache.addCacheArchive(new URI("/myapp/map.zip", job); |
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| 153 | DistributedCache.addFileToClassPath(new Path("/myapp/mylib.jar"), job); |
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| 154 | DistributedCache.addCacheArchive(new URI("/myapp/mytar.tar", job); |
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| 155 | DistributedCache.addCacheArchive(new URI("/myapp/mytgz.tgz", job); |
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| 156 | DistributedCache.addCacheArchive(new URI("/myapp/mytargz.tar.gz", job); |
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| 157 | |
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| 158 | 3. Use the cached files in the <A HREF="../../../../org/apache/hadoop/mapred/Mapper.html" title="interface in org.apache.hadoop.mapred"><CODE>Mapper</CODE></A> |
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| 159 | or <A HREF="../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred"><CODE>Reducer</CODE></A>: |
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| 160 | |
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| 161 | public static class MapClass extends MapReduceBase |
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| 162 | implements Mapper<K, V, K, V> { |
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| 163 | |
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| 164 | private Path[] localArchives; |
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| 165 | private Path[] localFiles; |
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| 166 | |
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| 167 | public void configure(JobConf job) { |
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| 168 | // Get the cached archives/files |
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| 169 | localArchives = DistributedCache.getLocalCacheArchives(job); |
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| 170 | localFiles = DistributedCache.getLocalCacheFiles(job); |
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| 171 | } |
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| 172 | |
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| 173 | public void map(K key, V value, |
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| 174 | OutputCollector<K, V> output, Reporter reporter) |
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| 175 | throws IOException { |
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| 176 | // Use data from the cached archives/files here |
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| 177 | // ... |
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| 178 | // ... |
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| 179 | output.collect(k, v); |
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| 180 | } |
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| 181 | } |
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| 182 | |
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| 183 | </pre></blockquote></p> |
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| 184 | <P> |
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| 185 | |
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| 186 | <P> |
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| 187 | <DL> |
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| 188 | <DT><B>See Also:</B><DD><A HREF="../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred"><CODE>JobConf</CODE></A>, |
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| 189 | <A HREF="../../../../org/apache/hadoop/mapred/JobClient.html" title="class in org.apache.hadoop.mapred"><CODE>JobClient</CODE></A></DL> |
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| 190 | <HR> |
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| 191 | |
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| 192 | <P> |
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| 193 | |
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| 194 | <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| 195 | |
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| 196 | <A NAME="constructor_summary"><!-- --></A> |
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| 197 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 198 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 199 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 200 | <B>Constructor Summary</B></FONT></TH> |
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| 201 | </TR> |
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| 202 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 203 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#DistributedCache()">DistributedCache</A></B>()</CODE> |
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| 204 | |
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| 205 | <BR> |
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| 206 | </TD> |
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| 207 | </TR> |
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| 208 | </TABLE> |
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| 209 | |
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| 210 | <!-- ========== METHOD SUMMARY =========== --> |
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| 211 | |
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| 212 | <A NAME="method_summary"><!-- --></A> |
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| 213 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 214 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 215 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 216 | <B>Method Summary</B></FONT></TH> |
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| 217 | </TR> |
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| 218 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 219 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 220 | <CODE>static void</CODE></FONT></TD> |
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| 221 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#addArchiveToClassPath(org.apache.hadoop.fs.Path, org.apache.hadoop.conf.Configuration)">addArchiveToClassPath</A></B>(<A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> archive, |
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| 222 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 223 | |
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| 224 | <BR> |
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| 225 | Add an archive path to the current set of classpath entries.</TD> |
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| 226 | </TR> |
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| 227 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 228 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 229 | <CODE>static void</CODE></FONT></TD> |
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| 230 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#addCacheArchive(java.net.URI, org.apache.hadoop.conf.Configuration)">addCacheArchive</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> uri, |
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| 231 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 232 | |
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| 233 | <BR> |
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| 234 | Add a archives to be localized to the conf</TD> |
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| 235 | </TR> |
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| 236 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 237 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 238 | <CODE>static void</CODE></FONT></TD> |
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| 239 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#addCacheFile(java.net.URI, org.apache.hadoop.conf.Configuration)">addCacheFile</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> uri, |
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| 240 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 241 | |
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| 242 | <BR> |
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| 243 | Add a file to be localized to the conf</TD> |
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| 244 | </TR> |
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| 245 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 246 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 247 | <CODE>static void</CODE></FONT></TD> |
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| 248 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#addFileToClassPath(org.apache.hadoop.fs.Path, org.apache.hadoop.conf.Configuration)">addFileToClassPath</A></B>(<A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> file, |
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| 249 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 250 | |
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| 251 | <BR> |
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| 252 | Add an file path to the current set of classpath entries It adds the file |
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| 253 | to cache as well.</TD> |
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| 254 | </TR> |
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| 255 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 256 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 257 | <CODE>static boolean</CODE></FONT></TD> |
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| 258 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#checkURIs(java.net.URI[], java.net.URI[])">checkURIs</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[] uriFiles, |
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| 259 | <A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[] uriArchives)</CODE> |
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| 260 | |
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| 261 | <BR> |
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| 262 | This method checks if there is a conflict in the fragment names |
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| 263 | of the uris.</TD> |
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| 264 | </TR> |
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| 265 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 266 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 267 | <CODE>static void</CODE></FONT></TD> |
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| 268 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#createAllSymlink(org.apache.hadoop.conf.Configuration, java.io.File, java.io.File)">createAllSymlink</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
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| 269 | <A HREF="http://java.sun.com/javase/6/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</A> jobCacheDir, |
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| 270 | <A HREF="http://java.sun.com/javase/6/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</A> workDir)</CODE> |
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| 271 | |
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| 272 | <BR> |
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| 273 | This method create symlinks for all files in a given dir in another directory</TD> |
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| 274 | </TR> |
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| 275 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 276 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 277 | <CODE>static void</CODE></FONT></TD> |
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| 278 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#createSymlink(org.apache.hadoop.conf.Configuration)">createSymlink</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 279 | |
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| 280 | <BR> |
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| 281 | This method allows you to create symlinks in the current working directory |
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| 282 | of the task to all the cache files/archives</TD> |
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| 283 | </TR> |
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| 284 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 285 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 286 | <CODE>static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A>[]</CODE></FONT></TD> |
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| 287 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getArchiveClassPaths(org.apache.hadoop.conf.Configuration)">getArchiveClassPaths</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 288 | |
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| 289 | <BR> |
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| 290 | Get the archive entries in classpath as an array of Path</TD> |
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| 291 | </TR> |
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| 292 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 293 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 294 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[]</CODE></FONT></TD> |
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| 295 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getArchiveTimestamps(org.apache.hadoop.conf.Configuration)">getArchiveTimestamps</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 296 | |
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| 297 | <BR> |
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| 298 | Get the timestamps of the archives</TD> |
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| 299 | </TR> |
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| 300 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 301 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 302 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[]</CODE></FONT></TD> |
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| 303 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getCacheArchives(org.apache.hadoop.conf.Configuration)">getCacheArchives</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 304 | |
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| 305 | <BR> |
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| 306 | Get cache archives set in the Configuration</TD> |
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| 307 | </TR> |
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| 308 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 309 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 310 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[]</CODE></FONT></TD> |
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| 311 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getCacheFiles(org.apache.hadoop.conf.Configuration)">getCacheFiles</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 312 | |
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| 313 | <BR> |
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| 314 | Get cache files set in the Configuration</TD> |
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| 315 | </TR> |
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| 316 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 317 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 318 | <CODE>static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A>[]</CODE></FONT></TD> |
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| 319 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getFileClassPaths(org.apache.hadoop.conf.Configuration)">getFileClassPaths</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 320 | |
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| 321 | <BR> |
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| 322 | Get the file entries in classpath as an array of Path</TD> |
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| 323 | </TR> |
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| 324 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 325 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 326 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[]</CODE></FONT></TD> |
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| 327 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getFileTimestamps(org.apache.hadoop.conf.Configuration)">getFileTimestamps</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 328 | |
---|
| 329 | <BR> |
---|
| 330 | Get the timestamps of the files</TD> |
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| 331 | </TR> |
---|
| 332 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 333 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 334 | <CODE>static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A></CODE></FONT></TD> |
---|
| 335 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getLocalCache(java.net.URI, org.apache.hadoop.conf.Configuration, org.apache.hadoop.fs.Path, boolean, long, org.apache.hadoop.fs.Path)">getLocalCache</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache, |
---|
| 336 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 337 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> baseDir, |
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| 338 | boolean isArchive, |
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| 339 | long confFileStamp, |
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| 340 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> currentWorkDir)</CODE> |
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| 341 | |
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| 342 | <BR> |
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| 343 | Get the locally cached file or archive; it could either be |
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| 344 | previously cached (and valid) or copy it from the <A HREF="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><CODE>FileSystem</CODE></A> now.</TD> |
---|
| 345 | </TR> |
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| 346 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 347 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 348 | <CODE>static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A></CODE></FONT></TD> |
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| 349 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getLocalCache(java.net.URI, org.apache.hadoop.conf.Configuration, org.apache.hadoop.fs.Path, org.apache.hadoop.fs.FileStatus, boolean, long, org.apache.hadoop.fs.Path)">getLocalCache</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache, |
---|
| 350 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 351 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> baseDir, |
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| 352 | <A HREF="../../../../org/apache/hadoop/fs/FileStatus.html" title="class in org.apache.hadoop.fs">FileStatus</A> fileStatus, |
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| 353 | boolean isArchive, |
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| 354 | long confFileStamp, |
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| 355 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> currentWorkDir)</CODE> |
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| 356 | |
---|
| 357 | <BR> |
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| 358 | Get the locally cached file or archive; it could either be |
---|
| 359 | previously cached (and valid) or copy it from the <A HREF="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><CODE>FileSystem</CODE></A> now.</TD> |
---|
| 360 | </TR> |
---|
| 361 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 362 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 363 | <CODE>static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A></CODE></FONT></TD> |
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| 364 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getLocalCache(java.net.URI, org.apache.hadoop.conf.Configuration, org.apache.hadoop.fs.Path, org.apache.hadoop.fs.FileStatus, boolean, long, org.apache.hadoop.fs.Path, boolean)">getLocalCache</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache, |
---|
| 365 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 366 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> baseDir, |
---|
| 367 | <A HREF="../../../../org/apache/hadoop/fs/FileStatus.html" title="class in org.apache.hadoop.fs">FileStatus</A> fileStatus, |
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| 368 | boolean isArchive, |
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| 369 | long confFileStamp, |
---|
| 370 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> currentWorkDir, |
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| 371 | boolean honorSymLinkConf)</CODE> |
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| 372 | |
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| 373 | <BR> |
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| 374 | Get the locally cached file or archive; it could either be |
---|
| 375 | previously cached (and valid) or copy it from the <A HREF="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><CODE>FileSystem</CODE></A> now.</TD> |
---|
| 376 | </TR> |
---|
| 377 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 378 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 379 | <CODE>static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A>[]</CODE></FONT></TD> |
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| 380 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getLocalCacheArchives(org.apache.hadoop.conf.Configuration)">getLocalCacheArchives</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 381 | |
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| 382 | <BR> |
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| 383 | Return the path array of the localized caches</TD> |
---|
| 384 | </TR> |
---|
| 385 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 386 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 387 | <CODE>static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A>[]</CODE></FONT></TD> |
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| 388 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getLocalCacheFiles(org.apache.hadoop.conf.Configuration)">getLocalCacheFiles</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 389 | |
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| 390 | <BR> |
---|
| 391 | Return the path array of the localized files</TD> |
---|
| 392 | </TR> |
---|
| 393 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 394 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 395 | <CODE>static boolean</CODE></FONT></TD> |
---|
| 396 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getSymlink(org.apache.hadoop.conf.Configuration)">getSymlink</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
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| 397 | |
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| 398 | <BR> |
---|
| 399 | This method checks to see if symlinks are to be create for the |
---|
| 400 | localized cache files in the current working directory</TD> |
---|
| 401 | </TR> |
---|
| 402 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 403 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 404 | <CODE>static long</CODE></FONT></TD> |
---|
| 405 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#getTimestamp(org.apache.hadoop.conf.Configuration, java.net.URI)">getTimestamp</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 406 | <A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache)</CODE> |
---|
| 407 | |
---|
| 408 | <BR> |
---|
| 409 | Returns mtime of a given cache file on hdfs.</TD> |
---|
| 410 | </TR> |
---|
| 411 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 412 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 413 | <CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> |
---|
| 414 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#makeRelative(java.net.URI, org.apache.hadoop.conf.Configuration)">makeRelative</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache, |
---|
| 415 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
---|
| 416 | |
---|
| 417 | <BR> |
---|
| 418 | </TD> |
---|
| 419 | </TR> |
---|
| 420 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 421 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 422 | <CODE>static void</CODE></FONT></TD> |
---|
| 423 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#purgeCache(org.apache.hadoop.conf.Configuration)">purgeCache</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
---|
| 424 | |
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| 425 | <BR> |
---|
| 426 | Clear the entire contents of the cache and delete the backing files.</TD> |
---|
| 427 | </TR> |
---|
| 428 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 429 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 430 | <CODE>static void</CODE></FONT></TD> |
---|
| 431 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#releaseCache(java.net.URI, org.apache.hadoop.conf.Configuration)">releaseCache</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache, |
---|
| 432 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
---|
| 433 | |
---|
| 434 | <BR> |
---|
| 435 | This is the opposite of getlocalcache.</TD> |
---|
| 436 | </TR> |
---|
| 437 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 438 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 439 | <CODE>static void</CODE></FONT></TD> |
---|
| 440 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#setArchiveTimestamps(org.apache.hadoop.conf.Configuration, java.lang.String)">setArchiveTimestamps</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 441 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> timestamps)</CODE> |
---|
| 442 | |
---|
| 443 | <BR> |
---|
| 444 | This is to check the timestamp of the archives to be localized</TD> |
---|
| 445 | </TR> |
---|
| 446 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 447 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 448 | <CODE>static void</CODE></FONT></TD> |
---|
| 449 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#setCacheArchives(java.net.URI[], org.apache.hadoop.conf.Configuration)">setCacheArchives</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[] archives, |
---|
| 450 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
---|
| 451 | |
---|
| 452 | <BR> |
---|
| 453 | Set the configuration with the given set of archives</TD> |
---|
| 454 | </TR> |
---|
| 455 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 456 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 457 | <CODE>static void</CODE></FONT></TD> |
---|
| 458 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#setCacheFiles(java.net.URI[], org.apache.hadoop.conf.Configuration)">setCacheFiles</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[] files, |
---|
| 459 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</CODE> |
---|
| 460 | |
---|
| 461 | <BR> |
---|
| 462 | Set the configuration with the given set of files</TD> |
---|
| 463 | </TR> |
---|
| 464 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 465 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 466 | <CODE>static void</CODE></FONT></TD> |
---|
| 467 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#setFileTimestamps(org.apache.hadoop.conf.Configuration, java.lang.String)">setFileTimestamps</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 468 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> timestamps)</CODE> |
---|
| 469 | |
---|
| 470 | <BR> |
---|
| 471 | This is to check the timestamp of the files to be localized</TD> |
---|
| 472 | </TR> |
---|
| 473 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 474 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 475 | <CODE>static void</CODE></FONT></TD> |
---|
| 476 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#setLocalArchives(org.apache.hadoop.conf.Configuration, java.lang.String)">setLocalArchives</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 477 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> str)</CODE> |
---|
| 478 | |
---|
| 479 | <BR> |
---|
| 480 | Set the conf to contain the location for localized archives</TD> |
---|
| 481 | </TR> |
---|
| 482 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 483 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
---|
| 484 | <CODE>static void</CODE></FONT></TD> |
---|
| 485 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/filecache/DistributedCache.html#setLocalFiles(org.apache.hadoop.conf.Configuration, java.lang.String)">setLocalFiles</A></B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 486 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> str)</CODE> |
---|
| 487 | |
---|
| 488 | <BR> |
---|
| 489 | Set the conf to contain the location for localized files</TD> |
---|
| 490 | </TR> |
---|
| 491 | </TABLE> |
---|
| 492 | <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
---|
| 493 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
---|
| 494 | <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
---|
| 495 | <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH> |
---|
| 496 | </TR> |
---|
| 497 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
---|
| 498 | <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD> |
---|
| 499 | </TR> |
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| 500 | </TABLE> |
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| 501 | |
---|
| 502 | <P> |
---|
| 503 | |
---|
| 504 | <!-- ========= CONSTRUCTOR DETAIL ======== --> |
---|
| 505 | |
---|
| 506 | <A NAME="constructor_detail"><!-- --></A> |
---|
| 507 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
---|
| 508 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
---|
| 509 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
---|
| 510 | <B>Constructor Detail</B></FONT></TH> |
---|
| 511 | </TR> |
---|
| 512 | </TABLE> |
---|
| 513 | |
---|
| 514 | <A NAME="DistributedCache()"><!-- --></A><H3> |
---|
| 515 | DistributedCache</H3> |
---|
| 516 | <PRE> |
---|
| 517 | public <B>DistributedCache</B>()</PRE> |
---|
| 518 | <DL> |
---|
| 519 | </DL> |
---|
| 520 | |
---|
| 521 | <!-- ============ METHOD DETAIL ========== --> |
---|
| 522 | |
---|
| 523 | <A NAME="method_detail"><!-- --></A> |
---|
| 524 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
---|
| 525 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
---|
| 526 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
---|
| 527 | <B>Method Detail</B></FONT></TH> |
---|
| 528 | </TR> |
---|
| 529 | </TABLE> |
---|
| 530 | |
---|
| 531 | <A NAME="getLocalCache(java.net.URI, org.apache.hadoop.conf.Configuration, org.apache.hadoop.fs.Path, org.apache.hadoop.fs.FileStatus, boolean, long, org.apache.hadoop.fs.Path)"><!-- --></A><H3> |
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| 532 | getLocalCache</H3> |
---|
| 533 | <PRE> |
---|
| 534 | public static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> <B>getLocalCache</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache, |
---|
| 535 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 536 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> baseDir, |
---|
| 537 | <A HREF="../../../../org/apache/hadoop/fs/FileStatus.html" title="class in org.apache.hadoop.fs">FileStatus</A> fileStatus, |
---|
| 538 | boolean isArchive, |
---|
| 539 | long confFileStamp, |
---|
| 540 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> currentWorkDir) |
---|
| 541 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 542 | <DL> |
---|
| 543 | <DD>Get the locally cached file or archive; it could either be |
---|
| 544 | previously cached (and valid) or copy it from the <A HREF="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><CODE>FileSystem</CODE></A> now. |
---|
| 545 | <P> |
---|
| 546 | <DD><DL> |
---|
| 547 | <DT><B>Parameters:</B><DD><CODE>cache</CODE> - the cache to be localized, this should be specified as |
---|
| 548 | new URI(hdfs://hostname:port/absolute_path_to_file#LINKNAME). If no schema |
---|
| 549 | or hostname:port is provided the file is assumed to be in the filesystem |
---|
| 550 | being used in the Configuration<DD><CODE>conf</CODE> - The Confguration file which contains the filesystem<DD><CODE>baseDir</CODE> - The base cache Dir where you wnat to localize the files/archives<DD><CODE>fileStatus</CODE> - The file status on the dfs.<DD><CODE>isArchive</CODE> - if the cache is an archive or a file. In case it is an |
---|
| 551 | archive with a .zip or .jar or .tar or .tgz or .tar.gz extension it will |
---|
| 552 | be unzipped/unjarred/untarred automatically |
---|
| 553 | and the directory where the archive is unzipped/unjarred/untarred is |
---|
| 554 | returned as the Path. |
---|
| 555 | In case of a file, the path to the file is returned<DD><CODE>confFileStamp</CODE> - this is the hdfs file modification timestamp to verify that the |
---|
| 556 | file to be cached hasn't changed since the job started<DD><CODE>currentWorkDir</CODE> - this is the directory where you would want to create symlinks |
---|
| 557 | for the locally cached files/archives |
---|
| 558 | <DT><B>Returns:</B><DD>the path to directory where the archives are unjarred in case of archives, |
---|
| 559 | the path to the file where the file is copied locally |
---|
| 560 | <DT><B>Throws:</B> |
---|
| 561 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 562 | </DD> |
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| 563 | </DL> |
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| 564 | <HR> |
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| 565 | |
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| 566 | <A NAME="getLocalCache(java.net.URI, org.apache.hadoop.conf.Configuration, org.apache.hadoop.fs.Path, org.apache.hadoop.fs.FileStatus, boolean, long, org.apache.hadoop.fs.Path, boolean)"><!-- --></A><H3> |
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| 567 | getLocalCache</H3> |
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| 568 | <PRE> |
---|
| 569 | public static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> <B>getLocalCache</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache, |
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| 570 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
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| 571 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> baseDir, |
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| 572 | <A HREF="../../../../org/apache/hadoop/fs/FileStatus.html" title="class in org.apache.hadoop.fs">FileStatus</A> fileStatus, |
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| 573 | boolean isArchive, |
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| 574 | long confFileStamp, |
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| 575 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> currentWorkDir, |
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| 576 | boolean honorSymLinkConf) |
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| 577 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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| 578 | <DL> |
---|
| 579 | <DD>Get the locally cached file or archive; it could either be |
---|
| 580 | previously cached (and valid) or copy it from the <A HREF="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><CODE>FileSystem</CODE></A> now. |
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| 581 | <P> |
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| 582 | <DD><DL> |
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| 583 | <DT><B>Parameters:</B><DD><CODE>cache</CODE> - the cache to be localized, this should be specified as |
---|
| 584 | new URI(hdfs://hostname:port/absolute_path_to_file#LINKNAME). If no schema |
---|
| 585 | or hostname:port is provided the file is assumed to be in the filesystem |
---|
| 586 | being used in the Configuration<DD><CODE>conf</CODE> - The Confguration file which contains the filesystem<DD><CODE>baseDir</CODE> - The base cache Dir where you wnat to localize the files/archives<DD><CODE>fileStatus</CODE> - The file status on the dfs.<DD><CODE>isArchive</CODE> - if the cache is an archive or a file. In case it is an |
---|
| 587 | archive with a .zip or .jar or .tar or .tgz or .tar.gz extension it will |
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| 588 | be unzipped/unjarred/untarred automatically |
---|
| 589 | and the directory where the archive is unzipped/unjarred/untarred is |
---|
| 590 | returned as the Path. |
---|
| 591 | In case of a file, the path to the file is returned<DD><CODE>confFileStamp</CODE> - this is the hdfs file modification timestamp to verify that the |
---|
| 592 | file to be cached hasn't changed since the job started<DD><CODE>currentWorkDir</CODE> - this is the directory where you would want to create symlinks |
---|
| 593 | for the locally cached files/archives<DD><CODE>honorSymLinkConf</CODE> - if this is false, then the symlinks are not |
---|
| 594 | created even if conf says so (this is required for an optimization in task |
---|
| 595 | launches |
---|
| 596 | <DT><B>Returns:</B><DD>the path to directory where the archives are unjarred in case of archives, |
---|
| 597 | the path to the file where the file is copied locally |
---|
| 598 | <DT><B>Throws:</B> |
---|
| 599 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 600 | </DD> |
---|
| 601 | </DL> |
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| 602 | <HR> |
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| 603 | |
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| 604 | <A NAME="getLocalCache(java.net.URI, org.apache.hadoop.conf.Configuration, org.apache.hadoop.fs.Path, boolean, long, org.apache.hadoop.fs.Path)"><!-- --></A><H3> |
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| 605 | getLocalCache</H3> |
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| 606 | <PRE> |
---|
| 607 | public static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> <B>getLocalCache</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache, |
---|
| 608 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 609 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> baseDir, |
---|
| 610 | boolean isArchive, |
---|
| 611 | long confFileStamp, |
---|
| 612 | <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> currentWorkDir) |
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| 613 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 614 | <DL> |
---|
| 615 | <DD>Get the locally cached file or archive; it could either be |
---|
| 616 | previously cached (and valid) or copy it from the <A HREF="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><CODE>FileSystem</CODE></A> now. |
---|
| 617 | <P> |
---|
| 618 | <DD><DL> |
---|
| 619 | <DT><B>Parameters:</B><DD><CODE>cache</CODE> - the cache to be localized, this should be specified as |
---|
| 620 | new URI(hdfs://hostname:port/absolute_path_to_file#LINKNAME). If no schema |
---|
| 621 | or hostname:port is provided the file is assumed to be in the filesystem |
---|
| 622 | being used in the Configuration<DD><CODE>conf</CODE> - The Confguration file which contains the filesystem<DD><CODE>baseDir</CODE> - The base cache Dir where you wnat to localize the files/archives<DD><CODE>isArchive</CODE> - if the cache is an archive or a file. In case it is an |
---|
| 623 | archive with a .zip or .jar or .tar or .tgz or .tar.gz extension it will |
---|
| 624 | be unzipped/unjarred/untarred automatically |
---|
| 625 | and the directory where the archive is unzipped/unjarred/untarred |
---|
| 626 | is returned as the Path. |
---|
| 627 | In case of a file, the path to the file is returned<DD><CODE>confFileStamp</CODE> - this is the hdfs file modification timestamp to verify that the |
---|
| 628 | file to be cached hasn't changed since the job started<DD><CODE>currentWorkDir</CODE> - this is the directory where you would want to create symlinks |
---|
| 629 | for the locally cached files/archives |
---|
| 630 | <DT><B>Returns:</B><DD>the path to directory where the archives are unjarred in case of archives, |
---|
| 631 | the path to the file where the file is copied locally |
---|
| 632 | <DT><B>Throws:</B> |
---|
| 633 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 634 | </DD> |
---|
| 635 | </DL> |
---|
| 636 | <HR> |
---|
| 637 | |
---|
| 638 | <A NAME="releaseCache(java.net.URI, org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 639 | releaseCache</H3> |
---|
| 640 | <PRE> |
---|
| 641 | public static void <B>releaseCache</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache, |
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| 642 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf) |
---|
| 643 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 644 | <DL> |
---|
| 645 | <DD>This is the opposite of getlocalcache. When you are done with |
---|
| 646 | using the cache, you need to release the cache |
---|
| 647 | <P> |
---|
| 648 | <DD><DL> |
---|
| 649 | <DT><B>Parameters:</B><DD><CODE>cache</CODE> - The cache URI to be released<DD><CODE>conf</CODE> - configuration which contains the filesystem the cache |
---|
| 650 | is contained in. |
---|
| 651 | <DT><B>Throws:</B> |
---|
| 652 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 653 | </DD> |
---|
| 654 | </DL> |
---|
| 655 | <HR> |
---|
| 656 | |
---|
| 657 | <A NAME="makeRelative(java.net.URI, org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 658 | makeRelative</H3> |
---|
| 659 | <PRE> |
---|
| 660 | public static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>makeRelative</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache, |
---|
| 661 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf) |
---|
| 662 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 663 | <DL> |
---|
| 664 | <DD><DL> |
---|
| 665 | |
---|
| 666 | <DT><B>Throws:</B> |
---|
| 667 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 668 | </DD> |
---|
| 669 | </DL> |
---|
| 670 | <HR> |
---|
| 671 | |
---|
| 672 | <A NAME="getTimestamp(org.apache.hadoop.conf.Configuration, java.net.URI)"><!-- --></A><H3> |
---|
| 673 | getTimestamp</H3> |
---|
| 674 | <PRE> |
---|
| 675 | public static long <B>getTimestamp</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 676 | <A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> cache) |
---|
| 677 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 678 | <DL> |
---|
| 679 | <DD>Returns mtime of a given cache file on hdfs. |
---|
| 680 | <P> |
---|
| 681 | <DD><DL> |
---|
| 682 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - configuration<DD><CODE>cache</CODE> - cache file |
---|
| 683 | <DT><B>Returns:</B><DD>mtime of a given cache file on hdfs |
---|
| 684 | <DT><B>Throws:</B> |
---|
| 685 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 686 | </DD> |
---|
| 687 | </DL> |
---|
| 688 | <HR> |
---|
| 689 | |
---|
| 690 | <A NAME="createAllSymlink(org.apache.hadoop.conf.Configuration, java.io.File, java.io.File)"><!-- --></A><H3> |
---|
| 691 | createAllSymlink</H3> |
---|
| 692 | <PRE> |
---|
| 693 | public static void <B>createAllSymlink</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 694 | <A HREF="http://java.sun.com/javase/6/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</A> jobCacheDir, |
---|
| 695 | <A HREF="http://java.sun.com/javase/6/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</A> workDir) |
---|
| 696 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 697 | <DL> |
---|
| 698 | <DD>This method create symlinks for all files in a given dir in another directory |
---|
| 699 | <P> |
---|
| 700 | <DD><DL> |
---|
| 701 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the configuration<DD><CODE>jobCacheDir</CODE> - the target directory for creating symlinks<DD><CODE>workDir</CODE> - the directory in which the symlinks are created |
---|
| 702 | <DT><B>Throws:</B> |
---|
| 703 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 704 | </DD> |
---|
| 705 | </DL> |
---|
| 706 | <HR> |
---|
| 707 | |
---|
| 708 | <A NAME="setCacheArchives(java.net.URI[], org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 709 | setCacheArchives</H3> |
---|
| 710 | <PRE> |
---|
| 711 | public static void <B>setCacheArchives</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[] archives, |
---|
| 712 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
| 713 | <DL> |
---|
| 714 | <DD>Set the configuration with the given set of archives |
---|
| 715 | <P> |
---|
| 716 | <DD><DL> |
---|
| 717 | <DT><B>Parameters:</B><DD><CODE>archives</CODE> - The list of archives that need to be localized<DD><CODE>conf</CODE> - Configuration which will be changed</DL> |
---|
| 718 | </DD> |
---|
| 719 | </DL> |
---|
| 720 | <HR> |
---|
| 721 | |
---|
| 722 | <A NAME="setCacheFiles(java.net.URI[], org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 723 | setCacheFiles</H3> |
---|
| 724 | <PRE> |
---|
| 725 | public static void <B>setCacheFiles</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[] files, |
---|
| 726 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
| 727 | <DL> |
---|
| 728 | <DD>Set the configuration with the given set of files |
---|
| 729 | <P> |
---|
| 730 | <DD><DL> |
---|
| 731 | <DT><B>Parameters:</B><DD><CODE>files</CODE> - The list of files that need to be localized<DD><CODE>conf</CODE> - Configuration which will be changed</DL> |
---|
| 732 | </DD> |
---|
| 733 | </DL> |
---|
| 734 | <HR> |
---|
| 735 | |
---|
| 736 | <A NAME="getCacheArchives(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 737 | getCacheArchives</H3> |
---|
| 738 | <PRE> |
---|
| 739 | public static <A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[] <B>getCacheArchives</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf) |
---|
| 740 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 741 | <DL> |
---|
| 742 | <DD>Get cache archives set in the Configuration |
---|
| 743 | <P> |
---|
| 744 | <DD><DL> |
---|
| 745 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - The configuration which contains the archives |
---|
| 746 | <DT><B>Returns:</B><DD>A URI array of the caches set in the Configuration |
---|
| 747 | <DT><B>Throws:</B> |
---|
| 748 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 749 | </DD> |
---|
| 750 | </DL> |
---|
| 751 | <HR> |
---|
| 752 | |
---|
| 753 | <A NAME="getCacheFiles(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 754 | getCacheFiles</H3> |
---|
| 755 | <PRE> |
---|
| 756 | public static <A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[] <B>getCacheFiles</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf) |
---|
| 757 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 758 | <DL> |
---|
| 759 | <DD>Get cache files set in the Configuration |
---|
| 760 | <P> |
---|
| 761 | <DD><DL> |
---|
| 762 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - The configuration which contains the files |
---|
| 763 | <DT><B>Returns:</B><DD>A URI array of the files set in the Configuration |
---|
| 764 | <DT><B>Throws:</B> |
---|
| 765 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 766 | </DD> |
---|
| 767 | </DL> |
---|
| 768 | <HR> |
---|
| 769 | |
---|
| 770 | <A NAME="getLocalCacheArchives(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 771 | getLocalCacheArchives</H3> |
---|
| 772 | <PRE> |
---|
| 773 | public static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A>[] <B>getLocalCacheArchives</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf) |
---|
| 774 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 775 | <DL> |
---|
| 776 | <DD>Return the path array of the localized caches |
---|
| 777 | <P> |
---|
| 778 | <DD><DL> |
---|
| 779 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - Configuration that contains the localized archives |
---|
| 780 | <DT><B>Returns:</B><DD>A path array of localized caches |
---|
| 781 | <DT><B>Throws:</B> |
---|
| 782 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 783 | </DD> |
---|
| 784 | </DL> |
---|
| 785 | <HR> |
---|
| 786 | |
---|
| 787 | <A NAME="getLocalCacheFiles(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 788 | getLocalCacheFiles</H3> |
---|
| 789 | <PRE> |
---|
| 790 | public static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A>[] <B>getLocalCacheFiles</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf) |
---|
| 791 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 792 | <DL> |
---|
| 793 | <DD>Return the path array of the localized files |
---|
| 794 | <P> |
---|
| 795 | <DD><DL> |
---|
| 796 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - Configuration that contains the localized files |
---|
| 797 | <DT><B>Returns:</B><DD>A path array of localized files |
---|
| 798 | <DT><B>Throws:</B> |
---|
| 799 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 800 | </DD> |
---|
| 801 | </DL> |
---|
| 802 | <HR> |
---|
| 803 | |
---|
| 804 | <A NAME="getArchiveTimestamps(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 805 | getArchiveTimestamps</H3> |
---|
| 806 | <PRE> |
---|
| 807 | public static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] <B>getArchiveTimestamps</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
| 808 | <DL> |
---|
| 809 | <DD>Get the timestamps of the archives |
---|
| 810 | <P> |
---|
| 811 | <DD><DL> |
---|
| 812 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - The configuration which stored the timestamps |
---|
| 813 | <DT><B>Returns:</B><DD>a string array of timestamps |
---|
| 814 | <DT><B>Throws:</B> |
---|
| 815 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 816 | </DD> |
---|
| 817 | </DL> |
---|
| 818 | <HR> |
---|
| 819 | |
---|
| 820 | <A NAME="getFileTimestamps(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 821 | getFileTimestamps</H3> |
---|
| 822 | <PRE> |
---|
| 823 | public static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[] <B>getFileTimestamps</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
| 824 | <DL> |
---|
| 825 | <DD>Get the timestamps of the files |
---|
| 826 | <P> |
---|
| 827 | <DD><DL> |
---|
| 828 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - The configuration which stored the timestamps |
---|
| 829 | <DT><B>Returns:</B><DD>a string array of timestamps |
---|
| 830 | <DT><B>Throws:</B> |
---|
| 831 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 832 | </DD> |
---|
| 833 | </DL> |
---|
| 834 | <HR> |
---|
| 835 | |
---|
| 836 | <A NAME="setArchiveTimestamps(org.apache.hadoop.conf.Configuration, java.lang.String)"><!-- --></A><H3> |
---|
| 837 | setArchiveTimestamps</H3> |
---|
| 838 | <PRE> |
---|
| 839 | public static void <B>setArchiveTimestamps</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 840 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> timestamps)</PRE> |
---|
| 841 | <DL> |
---|
| 842 | <DD>This is to check the timestamp of the archives to be localized |
---|
| 843 | <P> |
---|
| 844 | <DD><DL> |
---|
| 845 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - Configuration which stores the timestamp's<DD><CODE>timestamps</CODE> - comma separated list of timestamps of archives. |
---|
| 846 | The order should be the same as the order in which the archives are added.</DL> |
---|
| 847 | </DD> |
---|
| 848 | </DL> |
---|
| 849 | <HR> |
---|
| 850 | |
---|
| 851 | <A NAME="setFileTimestamps(org.apache.hadoop.conf.Configuration, java.lang.String)"><!-- --></A><H3> |
---|
| 852 | setFileTimestamps</H3> |
---|
| 853 | <PRE> |
---|
| 854 | public static void <B>setFileTimestamps</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 855 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> timestamps)</PRE> |
---|
| 856 | <DL> |
---|
| 857 | <DD>This is to check the timestamp of the files to be localized |
---|
| 858 | <P> |
---|
| 859 | <DD><DL> |
---|
| 860 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - Configuration which stores the timestamp's<DD><CODE>timestamps</CODE> - comma separated list of timestamps of files. |
---|
| 861 | The order should be the same as the order in which the files are added.</DL> |
---|
| 862 | </DD> |
---|
| 863 | </DL> |
---|
| 864 | <HR> |
---|
| 865 | |
---|
| 866 | <A NAME="setLocalArchives(org.apache.hadoop.conf.Configuration, java.lang.String)"><!-- --></A><H3> |
---|
| 867 | setLocalArchives</H3> |
---|
| 868 | <PRE> |
---|
| 869 | public static void <B>setLocalArchives</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 870 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> str)</PRE> |
---|
| 871 | <DL> |
---|
| 872 | <DD>Set the conf to contain the location for localized archives |
---|
| 873 | <P> |
---|
| 874 | <DD><DL> |
---|
| 875 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - The conf to modify to contain the localized caches<DD><CODE>str</CODE> - a comma separated list of local archives</DL> |
---|
| 876 | </DD> |
---|
| 877 | </DL> |
---|
| 878 | <HR> |
---|
| 879 | |
---|
| 880 | <A NAME="setLocalFiles(org.apache.hadoop.conf.Configuration, java.lang.String)"><!-- --></A><H3> |
---|
| 881 | setLocalFiles</H3> |
---|
| 882 | <PRE> |
---|
| 883 | public static void <B>setLocalFiles</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf, |
---|
| 884 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> str)</PRE> |
---|
| 885 | <DL> |
---|
| 886 | <DD>Set the conf to contain the location for localized files |
---|
| 887 | <P> |
---|
| 888 | <DD><DL> |
---|
| 889 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - The conf to modify to contain the localized caches<DD><CODE>str</CODE> - a comma separated list of local files</DL> |
---|
| 890 | </DD> |
---|
| 891 | </DL> |
---|
| 892 | <HR> |
---|
| 893 | |
---|
| 894 | <A NAME="addCacheArchive(java.net.URI, org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 895 | addCacheArchive</H3> |
---|
| 896 | <PRE> |
---|
| 897 | public static void <B>addCacheArchive</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> uri, |
---|
| 898 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
| 899 | <DL> |
---|
| 900 | <DD>Add a archives to be localized to the conf |
---|
| 901 | <P> |
---|
| 902 | <DD><DL> |
---|
| 903 | <DT><B>Parameters:</B><DD><CODE>uri</CODE> - The uri of the cache to be localized<DD><CODE>conf</CODE> - Configuration to add the cache to</DL> |
---|
| 904 | </DD> |
---|
| 905 | </DL> |
---|
| 906 | <HR> |
---|
| 907 | |
---|
| 908 | <A NAME="addCacheFile(java.net.URI, org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 909 | addCacheFile</H3> |
---|
| 910 | <PRE> |
---|
| 911 | public static void <B>addCacheFile</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A> uri, |
---|
| 912 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
| 913 | <DL> |
---|
| 914 | <DD>Add a file to be localized to the conf |
---|
| 915 | <P> |
---|
| 916 | <DD><DL> |
---|
| 917 | <DT><B>Parameters:</B><DD><CODE>uri</CODE> - The uri of the cache to be localized<DD><CODE>conf</CODE> - Configuration to add the cache to</DL> |
---|
| 918 | </DD> |
---|
| 919 | </DL> |
---|
| 920 | <HR> |
---|
| 921 | |
---|
| 922 | <A NAME="addFileToClassPath(org.apache.hadoop.fs.Path, org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 923 | addFileToClassPath</H3> |
---|
| 924 | <PRE> |
---|
| 925 | public static void <B>addFileToClassPath</B>(<A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> file, |
---|
| 926 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf) |
---|
| 927 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 928 | <DL> |
---|
| 929 | <DD>Add an file path to the current set of classpath entries It adds the file |
---|
| 930 | to cache as well. |
---|
| 931 | <P> |
---|
| 932 | <DD><DL> |
---|
| 933 | <DT><B>Parameters:</B><DD><CODE>file</CODE> - Path of the file to be added<DD><CODE>conf</CODE> - Configuration that contains the classpath setting |
---|
| 934 | <DT><B>Throws:</B> |
---|
| 935 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 936 | </DD> |
---|
| 937 | </DL> |
---|
| 938 | <HR> |
---|
| 939 | |
---|
| 940 | <A NAME="getFileClassPaths(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 941 | getFileClassPaths</H3> |
---|
| 942 | <PRE> |
---|
| 943 | public static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A>[] <B>getFileClassPaths</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
| 944 | <DL> |
---|
| 945 | <DD>Get the file entries in classpath as an array of Path |
---|
| 946 | <P> |
---|
| 947 | <DD><DL> |
---|
| 948 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - Configuration that contains the classpath setting</DL> |
---|
| 949 | </DD> |
---|
| 950 | </DL> |
---|
| 951 | <HR> |
---|
| 952 | |
---|
| 953 | <A NAME="addArchiveToClassPath(org.apache.hadoop.fs.Path, org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 954 | addArchiveToClassPath</H3> |
---|
| 955 | <PRE> |
---|
| 956 | public static void <B>addArchiveToClassPath</B>(<A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A> archive, |
---|
| 957 | <A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf) |
---|
| 958 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 959 | <DL> |
---|
| 960 | <DD>Add an archive path to the current set of classpath entries. It adds the |
---|
| 961 | archive to cache as well. |
---|
| 962 | <P> |
---|
| 963 | <DD><DL> |
---|
| 964 | <DT><B>Parameters:</B><DD><CODE>archive</CODE> - Path of the archive to be added<DD><CODE>conf</CODE> - Configuration that contains the classpath setting |
---|
| 965 | <DT><B>Throws:</B> |
---|
| 966 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
---|
| 967 | </DD> |
---|
| 968 | </DL> |
---|
| 969 | <HR> |
---|
| 970 | |
---|
| 971 | <A NAME="getArchiveClassPaths(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 972 | getArchiveClassPaths</H3> |
---|
| 973 | <PRE> |
---|
| 974 | public static <A HREF="../../../../org/apache/hadoop/fs/Path.html" title="class in org.apache.hadoop.fs">Path</A>[] <B>getArchiveClassPaths</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
| 975 | <DL> |
---|
| 976 | <DD>Get the archive entries in classpath as an array of Path |
---|
| 977 | <P> |
---|
| 978 | <DD><DL> |
---|
| 979 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - Configuration that contains the classpath setting</DL> |
---|
| 980 | </DD> |
---|
| 981 | </DL> |
---|
| 982 | <HR> |
---|
| 983 | |
---|
| 984 | <A NAME="createSymlink(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 985 | createSymlink</H3> |
---|
| 986 | <PRE> |
---|
| 987 | public static void <B>createSymlink</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
| 988 | <DL> |
---|
| 989 | <DD>This method allows you to create symlinks in the current working directory |
---|
| 990 | of the task to all the cache files/archives |
---|
| 991 | <P> |
---|
| 992 | <DD><DL> |
---|
| 993 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the jobconf</DL> |
---|
| 994 | </DD> |
---|
| 995 | </DL> |
---|
| 996 | <HR> |
---|
| 997 | |
---|
| 998 | <A NAME="getSymlink(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 999 | getSymlink</H3> |
---|
| 1000 | <PRE> |
---|
| 1001 | public static boolean <B>getSymlink</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf)</PRE> |
---|
| 1002 | <DL> |
---|
| 1003 | <DD>This method checks to see if symlinks are to be create for the |
---|
| 1004 | localized cache files in the current working directory |
---|
| 1005 | <P> |
---|
| 1006 | <DD><DL> |
---|
| 1007 | <DT><B>Parameters:</B><DD><CODE>conf</CODE> - the jobconf |
---|
| 1008 | <DT><B>Returns:</B><DD>true if symlinks are to be created- else return false</DL> |
---|
| 1009 | </DD> |
---|
| 1010 | </DL> |
---|
| 1011 | <HR> |
---|
| 1012 | |
---|
| 1013 | <A NAME="checkURIs(java.net.URI[], java.net.URI[])"><!-- --></A><H3> |
---|
| 1014 | checkURIs</H3> |
---|
| 1015 | <PRE> |
---|
| 1016 | public static boolean <B>checkURIs</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[] uriFiles, |
---|
| 1017 | <A HREF="http://java.sun.com/javase/6/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</A>[] uriArchives)</PRE> |
---|
| 1018 | <DL> |
---|
| 1019 | <DD>This method checks if there is a conflict in the fragment names |
---|
| 1020 | of the uris. Also makes sure that each uri has a fragment. It |
---|
| 1021 | is only to be called if you want to create symlinks for |
---|
| 1022 | the various archives and files. |
---|
| 1023 | <P> |
---|
| 1024 | <DD><DL> |
---|
| 1025 | <DT><B>Parameters:</B><DD><CODE>uriFiles</CODE> - The uri array of urifiles<DD><CODE>uriArchives</CODE> - the uri array of uri archives</DL> |
---|
| 1026 | </DD> |
---|
| 1027 | </DL> |
---|
| 1028 | <HR> |
---|
| 1029 | |
---|
| 1030 | <A NAME="purgeCache(org.apache.hadoop.conf.Configuration)"><!-- --></A><H3> |
---|
| 1031 | purgeCache</H3> |
---|
| 1032 | <PRE> |
---|
| 1033 | public static void <B>purgeCache</B>(<A HREF="../../../../org/apache/hadoop/conf/Configuration.html" title="class in org.apache.hadoop.conf">Configuration</A> conf) |
---|
| 1034 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
---|
| 1035 | <DL> |
---|
| 1036 | <DD>Clear the entire contents of the cache and delete the backing files. This |
---|
| 1037 | should only be used when the server is reinitializing, because the users |
---|
| 1038 | are going to lose their files. |
---|
| 1039 | <P> |
---|
| 1040 | <DD><DL> |
---|
| 1041 | |
---|
| 1042 | <DT><B>Throws:</B> |
---|
| 1043 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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| 1044 | </DD> |
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| 1045 | </DL> |
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