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| 231 | <a href="#Hadoop%E7%9A%84%E6%9C%BA%E6%9E%B6%E6%84%9F%E7%9F%A5">Hadoopçæºæ¶æç¥</a> |
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| 232 | </li> |
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| 263 | </li> |
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| 273 | <p>éåžžïŒé矀éçäžå°æºåšè¢«æå®äžº |
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| 277 | |
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| 279 | <a name="N10060"></a><a name="%E9%85%8D%E7%BD%AE"></a> |
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| 287 | |
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| 306 | <a name="N100B4"></a><a name="%E9%85%8D%E7%BD%AEHadoop%E5%AE%88%E6%8A%A4%E8%BF%9B%E7%A8%8B%E7%9A%84%E8%BF%90%E8%A1%8C%E7%8E%AF%E5%A2%83"></a> |
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| 320 | <td colspan="1" rowspan="1">NameNode</td><td colspan="1" rowspan="1">HADOOP_NAMENODE_OPTS</td> |
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| 322 | |
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| 324 | <td colspan="1" rowspan="1">DataNode</td><td colspan="1" rowspan="1">HADOOP_DATANODE_OPTS</td> |
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| 325 | </tr> |
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| 326 | |
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| 327 | <tr> |
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| 328 | <td colspan="1" rowspan="1">SecondaryNamenode</td> |
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| 329 | <td colspan="1" rowspan="1">HADOOP_SECONDARYNAMENODE_OPTS</td> |
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| 330 | </tr> |
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| 331 | |
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| 332 | <tr> |
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| 333 | <td colspan="1" rowspan="1">JobTracker</td><td colspan="1" rowspan="1">HADOOP_JOBTRACKER_OPTS</td> |
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| 334 | </tr> |
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| 335 | |
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| 336 | <tr> |
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| 337 | <td colspan="1" rowspan="1">TaskTracker</td><td colspan="1" rowspan="1">HADOOP_TASKTRACKER_OPTS</td> |
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| 340 | </table> |
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| 342 | èŠæäžé¢ç代ç å å
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---|
| 343 | <br> |
---|
| 344 | <span class="codefrag"> |
---|
| 345 | export HADOOP_NAMENODE_OPTS="-XX:+UseParallelGC ${HADOOP_NAMENODE_OPTS}" |
---|
| 346 | </span> |
---|
| 347 | <br> |
---|
| 348 | </p> |
---|
| 349 | <p>å
¶å®å¯å®å¶çåžžçšåæ°è¿å
æ¬ïŒ</p> |
---|
| 350 | <ul> |
---|
| 351 | |
---|
| 352 | <li> |
---|
| 353 | |
---|
| 354 | <span class="codefrag">HADOOP_LOG_DIR</span> - å®æ€è¿çšæ¥å¿æ件çåæŸç®åœãåŠæäžååšäŒè¢«èªåšå建ã |
---|
| 355 | </li> |
---|
| 356 | |
---|
| 357 | <li> |
---|
| 358 | |
---|
| 359 | <span class="codefrag">HADOOP_HEAPSIZE</span> - æ倧å¯çšçå 倧å°ïŒåäœäžºMBãæ¯åŠïŒ<span class="codefrag">1000MB</span>ã |
---|
| 360 | è¿äžªåæ°çšäºè®Ÿçœ®hadoopå®æ€è¿çšçå 倧å°ã猺ç倧å°æ¯<span class="codefrag">1000MB</span>ã |
---|
| 361 | </li> |
---|
| 362 | |
---|
| 363 | </ul> |
---|
| 364 | <a name="N1012F"></a><a name="%E9%85%8D%E7%BD%AEHadoop%E5%AE%88%E6%8A%A4%E8%BF%9B%E7%A8%8B%E7%9A%84%E8%BF%90%E8%A1%8C%E5%8F%82%E6%95%B0"></a> |
---|
| 365 | <h4>é
眮Hadoopå®æ€è¿çšçè¿è¡åæ°</h4> |
---|
| 366 | <p>è¿éšåæ¶åHadoopé矀çéèŠåæ°ïŒè¿äºåæ°åš<span class="codefrag">conf/hadoop-site.xml</span>äžæå®ã</p> |
---|
| 367 | <table class="ForrestTable" cellspacing="1" cellpadding="4"> |
---|
| 368 | |
---|
| 369 | <tr> |
---|
| 370 | |
---|
| 371 | <th colspan="1" rowspan="1">åæ°</th> |
---|
| 372 | <th colspan="1" rowspan="1">ååŒ</th> |
---|
| 373 | <th colspan="1" rowspan="1">å€æ³š</th> |
---|
| 374 | |
---|
| 375 | </tr> |
---|
| 376 | |
---|
| 377 | <tr> |
---|
| 378 | |
---|
| 379 | <td colspan="1" rowspan="1">fs.default.name</td> |
---|
| 380 | <td colspan="1" rowspan="1"><span class="codefrag">NameNode</span>çURIã</td> |
---|
| 381 | <td colspan="1" rowspan="1"><em>hdfs://äž»æºå/</em></td> |
---|
| 382 | |
---|
| 383 | </tr> |
---|
| 384 | |
---|
| 385 | <tr> |
---|
| 386 | |
---|
| 387 | <td colspan="1" rowspan="1">mapred.job.tracker</td> |
---|
| 388 | <td colspan="1" rowspan="1"><span class="codefrag">JobTracker</span>çäž»æºïŒæè
IPïŒå端å£ã</td> |
---|
| 389 | <td colspan="1" rowspan="1"><em>äž»æº:端å£</em>ã</td> |
---|
| 390 | |
---|
| 391 | </tr> |
---|
| 392 | |
---|
| 393 | <tr> |
---|
| 394 | |
---|
| 395 | <td colspan="1" rowspan="1">dfs.name.dir</td> |
---|
| 396 | <td colspan="1" rowspan="1"> |
---|
| 397 | <span class="codefrag">NameNode</span>æä¹
ååšåå空éŽåäºå¡æ¥å¿çæ¬å°æ件系ç»è·¯åŸã</td> |
---|
| 398 | <td colspan="1" rowspan="1">åœè¿äžªåŒæ¯äžäžªéå·åå²çç®åœåè¡šæ¶ïŒnametableæ°æ®å°äŒè¢«å€å¶å°ææç®åœäžååäœå€ä»œã |
---|
| 399 | </td> |
---|
| 400 | |
---|
| 401 | </tr> |
---|
| 402 | |
---|
| 403 | <tr> |
---|
| 404 | |
---|
| 405 | <td colspan="1" rowspan="1">dfs.data.dir</td> |
---|
| 406 | <td colspan="1" rowspan="1"> |
---|
| 407 | <span class="codefrag">DataNode</span>åæŸåæ°æ®çæ¬å°æ件系ç»è·¯åŸïŒéå·åå²çåè¡šã |
---|
| 408 | </td> |
---|
| 409 | <td colspan="1" rowspan="1"> |
---|
| 410 | åœè¿äžªåŒæ¯éå·åå²çç®åœåè¡šæ¶ïŒæ°æ®å°è¢«ååšåšææç®åœäžïŒéåžžååžåšäžå讟å€äžã |
---|
| 411 | </td> |
---|
| 412 | |
---|
| 413 | </tr> |
---|
| 414 | |
---|
| 415 | <tr> |
---|
| 416 | |
---|
| 417 | <td colspan="1" rowspan="1">mapred.system.dir</td> |
---|
| 418 | <td colspan="1" rowspan="1">Map/Reduceæ¡æ¶ååšç³»ç»æ件çHDFSè·¯åŸãæ¯åŠ<span class="codefrag">/hadoop/mapred/system/</span>ã |
---|
| 419 | </td> |
---|
| 420 | <td colspan="1" rowspan="1">è¿äžªè·¯åŸæ¯é»è®€æ件系ç»ïŒHDFSïŒäžçè·¯åŸïŒ é¡»ä»æå¡åšå客æ·ç«¯äžåå¯è®¿é®ã |
---|
| 421 | </td> |
---|
| 422 | |
---|
| 423 | </tr> |
---|
| 424 | |
---|
| 425 | <tr> |
---|
| 426 | |
---|
| 427 | <td colspan="1" rowspan="1">mapred.local.dir</td> |
---|
| 428 | <td colspan="1" rowspan="1">æ¬å°æ件系ç»äžéå·åå²çè·¯åŸåè¡šïŒMap/Reduce䞎æ¶æ°æ®åæŸçå°æ¹ã |
---|
| 429 | </td> |
---|
| 430 | <td colspan="1" rowspan="1">å€è·¯åŸæå©äºå©çšç£çi/oã</td> |
---|
| 431 | |
---|
| 432 | </tr> |
---|
| 433 | |
---|
| 434 | <tr> |
---|
| 435 | |
---|
| 436 | <td colspan="1" rowspan="1">mapred.tasktracker.{map|reduce}.tasks.maximum</td> |
---|
| 437 | <td colspan="1" rowspan="1">æäž<span class="codefrag">TaskTracker</span>äžå¯è¿è¡çæ倧Map/Reduceä»»å¡æ°ïŒè¿äºä»»å¡å°åæ¶åèªè¿è¡ã |
---|
| 438 | </td> |
---|
| 439 | <td colspan="1" rowspan="1"> |
---|
| 440 | é»è®€äžº2ïŒ2䞪mapå2䞪reduceïŒïŒå¯äŸæ®ç¡¬ä»¶æ
åµæŽæ¹ã |
---|
| 441 | </td> |
---|
| 442 | |
---|
| 443 | </tr> |
---|
| 444 | |
---|
| 445 | <tr> |
---|
| 446 | |
---|
| 447 | <td colspan="1" rowspan="1">dfs.hosts/dfs.hosts.exclude</td> |
---|
| 448 | <td colspan="1" rowspan="1">讞å¯/æç»DataNodeåè¡šã</td> |
---|
| 449 | <td colspan="1" rowspan="1"> |
---|
| 450 | åŠæå¿
èŠïŒçšè¿äžªæ件æ§å¶è®žå¯çdatanodeåè¡šã |
---|
| 451 | </td> |
---|
| 452 | |
---|
| 453 | </tr> |
---|
| 454 | |
---|
| 455 | <tr> |
---|
| 456 | |
---|
| 457 | <td colspan="1" rowspan="1">mapred.hosts/mapred.hosts.exclude</td> |
---|
| 458 | <td colspan="1" rowspan="1">讞å¯/æç»TaskTrackeråè¡šã</td> |
---|
| 459 | <td colspan="1" rowspan="1"> |
---|
| 460 | åŠæå¿
èŠïŒçšè¿äžªæ件æ§å¶è®žå¯çTaskTrackeråè¡šã |
---|
| 461 | </td> |
---|
| 462 | |
---|
| 463 | </tr> |
---|
| 464 | |
---|
| 465 | </table> |
---|
| 466 | <p>éåžžïŒäžè¿°åæ°è¢«æ 记䞺 |
---|
| 467 | <a href="http://hadoop.apache.org/core/docs/r0.18.2/api/org/apache/hadoop/conf/Configuration.html#FinalParams"> |
---|
| 468 | final</a> 以确ä¿å®ä»¬äžè¢«çšæ·åºçšæŽæ¹ã |
---|
| 469 | </p> |
---|
| 470 | <a name="N1020C"></a><a name="%E7%8E%B0%E5%AE%9E%E4%B8%96%E7%95%8C%E7%9A%84%E9%9B%86%E7%BE%A4%E9%85%8D%E7%BD%AE"></a> |
---|
| 471 | <h5>ç°å®äžççé矀é
眮</h5> |
---|
| 472 | <p>è¿èçœååšå€§è§æš¡é矀äžè¿è¡<em>sort</em>åºåæµè¯(benchmark)æ¶äœ¿çšå°çäžäºé猺çé
眮ã</p> |
---|
| 473 | <ul> |
---|
| 474 | |
---|
| 475 | <li> |
---|
| 476 | |
---|
| 477 | <p>è¿è¡sort900çäžäºé猺çé
眮åŒïŒsort900å³åš900䞪èç¹çé矀äžå¯¹9TBçæ°æ®è¿è¡æåºïŒ</p> |
---|
| 478 | |
---|
| 479 | <table class="ForrestTable" cellspacing="1" cellpadding="4"> |
---|
| 480 | |
---|
| 481 | <tr> |
---|
| 482 | |
---|
| 483 | <th colspan="1" rowspan="1">åæ°</th> |
---|
| 484 | <th colspan="1" rowspan="1">ååŒ</th> |
---|
| 485 | <th colspan="1" rowspan="1">å€æ³š</th> |
---|
| 486 | |
---|
| 487 | </tr> |
---|
| 488 | |
---|
| 489 | <tr> |
---|
| 490 | |
---|
| 491 | <td colspan="1" rowspan="1">dfs.block.size</td> |
---|
| 492 | <td colspan="1" rowspan="1">134217728</td> |
---|
| 493 | <td colspan="1" rowspan="1">é对倧æ件系ç»ïŒHDFSçå倧å°å128MBã</td> |
---|
| 494 | |
---|
| 495 | </tr> |
---|
| 496 | |
---|
| 497 | <tr> |
---|
| 498 | |
---|
| 499 | <td colspan="1" rowspan="1">dfs.namenode.handler.count</td> |
---|
| 500 | <td colspan="1" rowspan="1">40</td> |
---|
| 501 | <td colspan="1" rowspan="1"> |
---|
| 502 | å¯åšæŽå€çNameNodeæå¡çº¿çšå»å€çæ¥èªå€§éDataNodeçRPC请æ±ã |
---|
| 503 | </td> |
---|
| 504 | |
---|
| 505 | </tr> |
---|
| 506 | |
---|
| 507 | <tr> |
---|
| 508 | |
---|
| 509 | <td colspan="1" rowspan="1">mapred.reduce.parallel.copies</td> |
---|
| 510 | <td colspan="1" rowspan="1">20</td> |
---|
| 511 | <td colspan="1" rowspan="1"> |
---|
| 512 | reduceå¯åšæŽå€ç并è¡æ·èŽåšä»¥è·å倧émapçèŸåºã |
---|
| 513 | </td> |
---|
| 514 | |
---|
| 515 | </tr> |
---|
| 516 | |
---|
| 517 | <tr> |
---|
| 518 | |
---|
| 519 | <td colspan="1" rowspan="1">mapred.child.java.opts</td> |
---|
| 520 | <td colspan="1" rowspan="1">-Xmx512M</td> |
---|
| 521 | <td colspan="1" rowspan="1"> |
---|
| 522 | 䞺map/reduceåèææºäœ¿çšæŽå€§çå ã |
---|
| 523 | </td> |
---|
| 524 | |
---|
| 525 | </tr> |
---|
| 526 | |
---|
| 527 | <tr> |
---|
| 528 | |
---|
| 529 | <td colspan="1" rowspan="1">fs.inmemory.size.mb</td> |
---|
| 530 | <td colspan="1" rowspan="1">200</td> |
---|
| 531 | <td colspan="1" rowspan="1"> |
---|
| 532 | 䞺reduceé¶æ®µå并mapèŸåºæéçå
åæ件系ç»åé
æŽå€çå
åã |
---|
| 533 | </td> |
---|
| 534 | |
---|
| 535 | </tr> |
---|
| 536 | |
---|
| 537 | <tr> |
---|
| 538 | |
---|
| 539 | <td colspan="1" rowspan="1">io.sort.factor</td> |
---|
| 540 | <td colspan="1" rowspan="1">100</td> |
---|
| 541 | <td colspan="1" rowspan="1">æ件æåºæ¶æŽå€çæµå°åæ¶è¢«åœå¹¶ã</td> |
---|
| 542 | |
---|
| 543 | </tr> |
---|
| 544 | |
---|
| 545 | <tr> |
---|
| 546 | |
---|
| 547 | <td colspan="1" rowspan="1">io.sort.mb</td> |
---|
| 548 | <td colspan="1" rowspan="1">200</td> |
---|
| 549 | <td colspan="1" rowspan="1">æé«æåºæ¶çå
åäžéã</td> |
---|
| 550 | |
---|
| 551 | </tr> |
---|
| 552 | |
---|
| 553 | <tr> |
---|
| 554 | |
---|
| 555 | <td colspan="1" rowspan="1">io.file.buffer.size</td> |
---|
| 556 | <td colspan="1" rowspan="1">131072</td> |
---|
| 557 | <td colspan="1" rowspan="1">SequenceFileäžçšå°ç读/åçŒå倧å°ã</td> |
---|
| 558 | |
---|
| 559 | </tr> |
---|
| 560 | |
---|
| 561 | </table> |
---|
| 562 | |
---|
| 563 | </li> |
---|
| 564 | |
---|
| 565 | <li> |
---|
| 566 | |
---|
| 567 | <p>è¿è¡sort1400åsort2000æ¶éèŠæŽæ°çé
眮ïŒå³åš1400䞪èç¹äžå¯¹14TBçæ°æ®è¿è¡æåºååš2000䞪èç¹äžå¯¹20TBçæ°æ®è¿è¡æåºïŒ</p> |
---|
| 568 | |
---|
| 569 | <table class="ForrestTable" cellspacing="1" cellpadding="4"> |
---|
| 570 | |
---|
| 571 | <tr> |
---|
| 572 | |
---|
| 573 | <th colspan="1" rowspan="1">åæ°</th> |
---|
| 574 | <th colspan="1" rowspan="1">ååŒ</th> |
---|
| 575 | <th colspan="1" rowspan="1">å€æ³š</th> |
---|
| 576 | |
---|
| 577 | </tr> |
---|
| 578 | |
---|
| 579 | <tr> |
---|
| 580 | |
---|
| 581 | <td colspan="1" rowspan="1">mapred.job.tracker.handler.count</td> |
---|
| 582 | <td colspan="1" rowspan="1">60</td> |
---|
| 583 | <td colspan="1" rowspan="1"> |
---|
| 584 | å¯çšæŽå€çJobTrackeræå¡çº¿çšå»å€çæ¥èªå€§éTaskTrackerçRPC请æ±ã |
---|
| 585 | </td> |
---|
| 586 | |
---|
| 587 | </tr> |
---|
| 588 | |
---|
| 589 | <tr> |
---|
| 590 | |
---|
| 591 | <td colspan="1" rowspan="1">mapred.reduce.parallel.copies</td> |
---|
| 592 | <td colspan="1" rowspan="1">50</td> |
---|
| 593 | <td colspan="1" rowspan="1"></td> |
---|
| 594 | |
---|
| 595 | </tr> |
---|
| 596 | |
---|
| 597 | <tr> |
---|
| 598 | |
---|
| 599 | <td colspan="1" rowspan="1">tasktracker.http.threads</td> |
---|
| 600 | <td colspan="1" rowspan="1">50</td> |
---|
| 601 | <td colspan="1" rowspan="1"> |
---|
| 602 | 䞺TaskTrackerçHttpæå¡å¯çšæŽå€çå·¥äœçº¿çšãreduceéè¿Httpæå¡è·åmapçäžéŽèŸåºã |
---|
| 603 | </td> |
---|
| 604 | |
---|
| 605 | </tr> |
---|
| 606 | |
---|
| 607 | <tr> |
---|
| 608 | |
---|
| 609 | <td colspan="1" rowspan="1">mapred.child.java.opts</td> |
---|
| 610 | <td colspan="1" rowspan="1">-Xmx1024M</td> |
---|
| 611 | <td colspan="1" rowspan="1">䜿çšæŽå€§çå çšäºmaps/reducesçåèææº</td> |
---|
| 612 | |
---|
| 613 | </tr> |
---|
| 614 | |
---|
| 615 | </table> |
---|
| 616 | |
---|
| 617 | </li> |
---|
| 618 | |
---|
| 619 | </ul> |
---|
| 620 | <a name="N1032A"></a><a name="Slaves"></a> |
---|
| 621 | <h4>Slaves</h4> |
---|
| 622 | <p>éåžžïŒäœ éæ©é矀äžçäžå°æºåšäœäžº<span class="codefrag">NameNode</span>ïŒåŠå€äžå°äžåçæºåšäœäžº<span class="codefrag">JobTracker</span>ãäœäžçæºåšå³äœäžº<span class="codefrag">DataNode</span>åäœäžº<span class="codefrag">TaskTracker</span>ïŒè¿äºè¢«ç§°ä¹äžº<em>slaves</em>ã</p> |
---|
| 623 | <p>åš<span class="codefrag">conf/slaves</span>æ件äžååºææslaveçäž»æºåæè
IPå°åïŒäžè¡äžäžªã</p> |
---|
| 624 | <a name="N10349"></a><a name="%E6%97%A5%E5%BF%97"></a> |
---|
| 625 | <h4>æ¥å¿</h4> |
---|
| 626 | <p>Hadoop䜿çš<a href="http://logging.apache.org/log4j/">Apache log4j</a>æ¥è®°åœæ¥å¿ïŒå®ç±<a href="http://commons.apache.org/logging/">Apache Commons Logging</a>æ¡æ¶æ¥å®ç°ãçŒèŸ<span class="codefrag">conf/log4j.properties</span>æ件å¯ä»¥æ¹åHadoopå®æ€è¿çšçæ¥å¿é
眮ïŒæ¥å¿æ ŒåŒçïŒã</p> |
---|
| 627 | <a name="N1035D"></a><a name="%E5%8E%86%E5%8F%B2%E6%97%A5%E5%BF%97"></a> |
---|
| 628 | <h5>åå²æ¥å¿</h5> |
---|
| 629 | <p>äœäžçåå²æ件éäžåæŸåš<span class="codefrag">hadoop.job.history.location</span>ïŒè¿äžªä¹å¯ä»¥æ¯åšååžåŒæ件系ç»äžçè·¯åŸïŒå
¶é»è®€åŒäžº<span class="codefrag">${HADOOP_LOG_DIR}/history</span>ãjobtrackerçweb UIäžæåå²æ¥å¿çweb UIéŸæ¥ã</p> |
---|
| 630 | <p>åå²æ件åšçšæ·æå®çç®åœ<span class="codefrag">hadoop.job.history.user.location</span>ä¹äŒè®°åœäžä»œïŒè¿äžªé
眮ç猺çåŒäžºäœäžçèŸåºç®åœãè¿äºæ件被åæŸåšæå®è·¯åŸäžç“_logs/history/”ç®åœäžãå æ€ïŒé»è®€æ
åµäžæ¥å¿æ件äŒåš“mapred.output.dir/_logs/history/”äžãåŠæå°<span class="codefrag">hadoop.job.history.user.location</span>æå®äžºåŒ<span class="codefrag">none</span>ïŒç³»ç»å°äžåè®°åœæ€æ¥å¿ã</p> |
---|
| 631 | <p>çšæ·å¯äœ¿çšä»¥äžåœä»€åšæå®è·¯åŸäžæ¥çåå²æ¥å¿æ±æ»<br> |
---|
| 632 | |
---|
| 633 | <span class="codefrag">$ bin/hadoop job -history output-dir</span> |
---|
| 634 | <br> |
---|
| 635 | è¿æ¡åœä»€äŒæŸç€ºäœäžçç»èä¿¡æ¯ïŒå€±èŽ¥åç»æ¢çä»»å¡ç»èã <br> |
---|
| 636 | å
³äºäœäžçæŽå€ç»èïŒæ¯åŠæåçä»»å¡ïŒä»¥å对æ¯äžªä»»å¡çæåçå°è¯æ¬¡æ°çå¯ä»¥çšäžé¢çåœä»€æ¥ç<br> |
---|
| 637 | |
---|
| 638 | <span class="codefrag">$ bin/hadoop job -history all output-dir</span> |
---|
| 639 | <br> |
---|
| 640 | </p> |
---|
| 641 | <p>äžäœå
šéšå¿
èŠçé
眮å®æïŒå°è¿äºæ件ååå°æææºåšç<span class="codefrag">HADOOP_CONF_DIR</span>è·¯åŸäžïŒéåžžæ¯<span class="codefrag">${HADOOP_HOME}/conf</span>ã</p> |
---|
| 642 | </div> |
---|
| 643 | |
---|
| 644 | |
---|
| 645 | <a name="N10395"></a><a name="Hadoop%E7%9A%84%E6%9C%BA%E6%9E%B6%E6%84%9F%E7%9F%A5"></a> |
---|
| 646 | <h2 class="h3">Hadoopçæºæ¶æç¥</h2> |
---|
| 647 | <div class="section"> |
---|
| 648 | <p>HDFSåMap/Reduceçç»ä»¶æ¯èœå€æç¥æºæ¶çã</p> |
---|
| 649 | <p> |
---|
| 650 | <span class="codefrag">NameNode</span>å<span class="codefrag">JobTracker</span>éè¿è°çšç®¡çåé
眮暡åäžçAPI<a href="http://hadoop.apache.org/core/docs/r0.18.2/api/org/apache/hadoop/net/DNSToSwitchMapping.html#resolve(java.util.List)">resolve</a>æ¥è·åé矀éæ¯äžªslaveç<span class="codefrag">æºæ¶id</span>ã该APIå°slaveçDNSå称ïŒæè
IPå°åïŒèœ¬æ¢ææºæ¶idã䜿çšåªäžªæš¡åæ¯éè¿é
眮项<span class="codefrag">topology.node.switch.mapping.impl</span>æ¥æå®çãæš¡åçé»è®€å®ç°äŒè°çš<span class="codefrag">topology.script.file.name</span>é
眮项æå®çäžäžªçèæ¬/åœä»€ã åŠætopology.script.file.nameæªè¢«è®Ÿçœ®ïŒå¯¹äºææäŒ å
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眮项<span class="codefrag">mapred.cache.task.levels</span>ïŒè¯¥åæ°å³å®cacheç级æ°ïŒåšçœç»ææäžïŒãäŸåŠïŒåŠæé»è®€åŒæ¯2ïŒäŒå»ºç«äž€çº§çcacheïŒ äžçº§é对䞻æºïŒäž»æº -> ä»»å¡çæ å°ïŒåŠäžçº§é对æºæ¶ïŒæºæ¶ -> ä»»å¡çæ å°ïŒã |
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| 651 | </p> |
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| 652 | </div> |
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| 653 | |
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| 654 | |
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| 655 | <a name="N103BA"></a><a name="%E5%90%AF%E5%8A%A8Hadoop"></a> |
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| 656 | <h2 class="h3">å¯åšHadoop</h2> |
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| 657 | <div class="section"> |
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| 658 | <p>å¯åšHadoopé矀éèŠå¯åšHDFSé矀åMap/Reduceé矀ã</p> |
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| 659 | <p> |
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| 660 | æ ŒåŒåäžäžªæ°çååžåŒæ件系ç»ïŒ<br> |
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| 661 | |
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| 662 | <span class="codefrag">$ bin/hadoop namenode -format</span> |
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| 663 | |
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| 664 | </p> |
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| 665 | <p> |
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| 666 | åšåé
ç<span class="codefrag">NameNode</span>äžïŒè¿è¡äžé¢çåœä»€å¯åšHDFSïŒ<br> |
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| 667 | |
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| 668 | <span class="codefrag">$ bin/start-dfs.sh</span> |
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| 669 | |
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| 670 | </p> |
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| 671 | <p> |
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| 672 | <span class="codefrag">bin/start-dfs.sh</span>èæ¬äŒåç
§<span class="codefrag">NameNode</span>äž<span class="codefrag">${HADOOP_CONF_DIR}/slaves</span>æ件çå
容ïŒåšææååºçslaveäžå¯åš<span class="codefrag">DataNode</span>å®æ€è¿çšã</p> |
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| 673 | <p> |
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| 674 | åšåé
ç<span class="codefrag">JobTracker</span>äžïŒè¿è¡äžé¢çåœä»€å¯åšMap/ReduceïŒ<br> |
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| 675 | |
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| 676 | <span class="codefrag">$ bin/start-mapred.sh</span> |
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| 677 | |
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| 678 | </p> |
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| 679 | <p> |
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| 680 | <span class="codefrag">bin/start-mapred.sh</span>èæ¬äŒåç
§<span class="codefrag">JobTracker</span>äž<span class="codefrag">${HADOOP_CONF_DIR}/slaves</span>æ件çå
容ïŒåšææååºçslaveäžå¯åš<span class="codefrag">TaskTracker</span>å®æ€è¿çšã</p> |
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| 681 | </div> |
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| 682 | |
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| 683 | |
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| 684 | <a name="N103FE"></a><a name="%E5%81%9C%E6%AD%A2Hadoop"></a> |
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| 685 | <h2 class="h3">åæ¢Hadoop</h2> |
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| 686 | <div class="section"> |
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| 687 | <p> |
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| 688 | åšåé
ç<span class="codefrag">NameNode</span>äžïŒæ§è¡äžé¢çåœä»€åæ¢HDFSïŒ<br> |
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| 689 | |
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| 690 | <span class="codefrag">$ bin/stop-dfs.sh</span> |
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| 691 | |
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| 692 | </p> |
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| 693 | <p> |
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| 694 | <span class="codefrag">bin/stop-dfs.sh</span>èæ¬äŒåç
§<span class="codefrag">NameNode</span>äž<span class="codefrag">${HADOOP_CONF_DIR}/slaves</span>æ件çå
容ïŒåšææååºçslaveäžåæ¢<span class="codefrag">DataNode</span>å®æ€è¿çšã</p> |
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| 695 | <p> |
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| 696 | åšåé
ç<span class="codefrag">JobTracker</span>äžïŒè¿è¡äžé¢çåœä»€åæ¢Map/ReduceïŒ<br> |
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| 697 | |
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| 698 | <span class="codefrag">$ bin/stop-mapred.sh</span> |
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| 699 | <br> |
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| 700 | |
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| 701 | </p> |
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| 702 | <p> |
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| 703 | <span class="codefrag">bin/stop-mapred.sh</span>èæ¬äŒåç
§<span class="codefrag">JobTracker</span>äž<span class="codefrag">${HADOOP_CONF_DIR}/slaves</span>æ件çå
容ïŒåšææååºçslaveäžåæ¢<span class="codefrag">TaskTracker</span>å®æ€è¿çšã</p> |
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| 704 | </div> |
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| 705 | |
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| 706 | </div> |
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| 718 | document.write("Last Published: " + document.lastModified); |
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| 719 | // --></script> |
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| 720 | </div> |
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| 721 | <div class="copyright"> |
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| 722 | Copyright © |
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| 723 | 2007 <a href="http://www.apache.org/licenses/">The Apache Software Foundation.</a> |
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| 724 | </div> |
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