這篇文章主要講解了“hadoop運(yùn)行實(shí)例分析”，文中的講解內(nèi)容簡單清晰，易于學(xué)習(xí)與理解，下面請大家跟著小編的思路慢慢深入，一起來研究和學(xué)習(xí)“hadoop運(yùn)行實(shí)例分析”吧！

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1.找到examples的jar包

2.創(chuàng)建輸入和輸出目錄

3.將需要分隔的文件上傳到wc_input目錄下

4.查看上傳的文件

5.hadoop jar /hadoop_soft/hadoop-2.7.2/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.2.jar wordcount /wc_input/* /wc_output/

 [root@hadoop input]# hadoop jar /hadoop_soft/hadoop-2.7.2/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.2.jar wordcount /wc_input/* /wc_output/
17/08/15 10:25:24 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
17/08/15 10:25:25 INFO client.RMProxy: Connecting to ResourceManager at /192.168.1.120:18040
17/08/15 10:25:27 INFO input.FileInputFormat: Total input paths to process : 2
17/08/15 10:25:27 INFO mapreduce.JobSubmitter: number of splits:2
17/08/15 10:25:28 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1502762082449_0001
17/08/15 10:25:28 INFO impl.YarnClientImpl: Submitted application application_1502762082449_0001
17/08/15 10:25:29 INFO mapreduce.Job: The url to track the job: http://hadoop:18088/proxy/application_1502762082449_0001/
17/08/15 10:25:29 INFO mapreduce.Job: Running job: job_1502762082449_0001
17/08/15 10:25:48 INFO mapreduce.Job: Job job_1502762082449_0001 running in uber mode : true
17/08/15 10:25:48 INFO mapreduce.Job:  map 0% reduce 0%
17/08/15 10:25:50 INFO mapreduce.Job:  map 100% reduce 0%
17/08/15 10:25:51 INFO mapreduce.Job:  map 100% reduce 100%
17/08/15 10:25:51 INFO mapreduce.Job: Job job_1502762082449_0001 completed successfully
17/08/15 10:25:52 INFO mapreduce.Job: Counters: 52
 File System Counters
  FILE: Number of bytes read=276
  FILE: Number of bytes written=545
  FILE: Number of read operations=0
  FILE: Number of large read operations=0
  FILE: Number of write operations=0
  HDFS: Number of bytes read=798
  HDFS: Number of bytes written=398613
  HDFS: Number of read operations=66
  HDFS: Number of large read operations=0
  HDFS: Number of write operations=23
 Job Counters
  Launched map tasks=2
  Launched reduce tasks=1
  Other local map tasks=2
  Total time spent by all maps in occupied slots (ms)=1972
  Total time spent by all reduces in occupied slots (ms)=803
  TOTAL_LAUNCHED_UBERTASKS=3
  NUM_UBER_SUBMAPS=2
  NUM_UBER_SUBREDUCES=1
  Total time spent by all map tasks (ms)=1972
  Total time spent by all reduce tasks (ms)=803
  Total vcore-milliseconds taken by all map tasks=1972
  Total vcore-milliseconds taken by all reduce tasks=803
  Total megabyte-milliseconds taken by all map tasks=2019328
  Total megabyte-milliseconds taken by all reduce tasks=822272
 Map-Reduce Framework
  Map input records=5
  Map output records=11
  Map output bytes=111
  Map output materialized bytes=109
  Input split bytes=210
  Combine input records=11
  Combine output records=8
  Reduce input groups=7
  Reduce shuffle bytes=109
  Reduce input records=8
  Reduce output records=7
  Spilled Records=16
  Shuffled Maps =2
  Failed Shuffles=0
  Merged Map outputs=2
  GC time elapsed (ms)=637
  CPU time spent (ms)=1820
  Physical memory (bytes) snapshot=830070784
  Virtual memory (bytes) snapshot=8998096896
  Total committed heap usage (bytes)=500510720
 Shuffle Errors
  BAD_ID=0
  CONNECTION=0
  IO_ERROR=0
  WRONG_LENGTH=0
  WRONG_MAP=0
  WRONG_REDUCE=0
 File Input Format Counters
  Bytes Read=70
 File Output Format Counters
  Bytes Written=57

6.查看運(yùn)行結(jié)果

7.檢查結(jié)果數(shù)據(jù)

感謝各位的閱讀，以上就是“hadoop運(yùn)行實(shí)例分析”的內(nèi)容了，經(jīng)過本文的學(xué)習(xí)后，相信大家對hadoop運(yùn)行實(shí)例分析這一問題有了更深刻的體會，具體使用情況還需要大家實(shí)踐驗證。這里是創(chuàng)新互聯(lián)，小編將為大家推送更多相關(guān)知識點(diǎn)的文章，歡迎關(guān)注！

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