1. 只有Map任务的Map Reduce Job
File System Counters FILE: Number of bytes read=3629530 FILE: Number of bytes written=98312 FILE: Number of read operations=0 FILE: Number of large read operations=0 FILE: Number of write operations=0 HDFS: Number of bytes read=8570654 HDFS: Number of bytes written=1404469 HDFS: Number of read operations=6 HDFS: Number of large read operations=0 HDFS: Number of write operations=2 Job Counters Launched map tasks=1 Data-local map tasks=1 Total time spent by all maps in occupied slots (ms)=14522 Total time spent by all reduces in occupied slots (ms)=0 Total time spent by all map tasks (ms)=14522 Total vcore-seconds taken by all map tasks=14522 Total megabyte-seconds taken by all map tasks=14870528 Map-Reduce Framework Map input records=7452 Map output records=7452 Input split bytes=146 Spilled Records=0 Failed Shuffles=0 Merged Map outputs=0 GC time elapsed (ms)=241 CPU time spent (ms)=9750 Physical memory (bytes) snapshot=184406016 Virtual memory (bytes) snapshot=893657088 Total committed heap usage (bytes)=89653248 File Input Format Counters Bytes Read=8570508 File Output Format Counters Bytes Written=1404469
2. 既有Map又有Reduce的MapReduce Job
File System Counters FILE: Number of bytes read=879582 FILE: Number of bytes written=198227 FILE: Number of read operations=0 FILE: Number of large read operations=0 FILE: Number of write operations=0 HDFS: Number of bytes read=2729649 HDFS: Number of bytes written=265 HDFS: Number of read operations=7 HDFS: Number of large read operations=0 HDFS: Number of write operations=2 Job Counters Launched map tasks=1 Launched reduce tasks=1 Data-local map tasks=1 Total time spent by all maps in occupied slots (ms)=7071 Total time spent by all reduces in occupied slots (ms)=7804 Total time spent by all map tasks (ms)=7071 Total time spent by all reduce tasks (ms)=7804 Total vcore-seconds taken by all map tasks=7071 Total vcore-seconds taken by all reduce tasks=7804 Total megabyte-seconds taken by all map tasks=7240704 Total megabyte-seconds taken by all reduce tasks=7991296 Map-Reduce Framework Map input records=20 Map output records=1 Map output bytes=167 Map output materialized bytes=182 Input split bytes=139 Combine input records=1 Combine output records=1 Reduce input groups=1 Reduce shuffle bytes=182 Reduce input records=1 Reduce output records=1 Spilled Records=2 Shuffled Maps =1 Failed Shuffles=0 Merged Map outputs=1 GC time elapsed (ms)=122 CPU time spent (ms)=3620 Physical memory (bytes) snapshot=451244032 Virtual memory (bytes) snapshot=1823916032 Total committed heap usage (bytes)=288882688 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=2729510 File Output Format Counters Bytes Written=265