【大数据】hadoop计数器
org.apache.hadoop.mapreduce.FileSystemCounterFILE_BYTES_READ
FILE_BYTES_WRITTEN
FILE_READ_OPS
FILE_LARGE_READ_OPS
FILE_WRITE_OPS
HDFS_BYTES_READ
HDFS_BYTES_WRITTEN
HDFS_READ_OPS
HDFS_LARGE_READ_OPS
HDFS_WRITE_OPS
org.apache.hadoop.mapreduce.JobCounter
TOTAL_LAUNCHED_MAPS
TOTAL_LAUNCHED_REDUCES
RACK_LOCAL_MAPS
SLOTS_MILLIS_MAPS
SLOTS_MILLIS_REDUCES
FALLOW_SLOTS_MILLIS_MAPS
FALLOW_SLOTS_MILLIS_REDUCES
org.apache.hadoop.mapreduce.TaskCounter
MAP_INPUT_RECORDS
MAP_OUTPUT_RECORDS
MAP_OUTPUT_BYTES
SPLIT_RAW_BYTES
COMBINE_INPUT_RECORDS
COMBINE_OUTPUT_RECORDS
REDUCE_INPUT_GROUPS
REDUCE_SHUFFLE_BYTES
REDUCE_INPUT_RECORDS
REDUCE_OUTPUT_RECORDS
SPILLED_RECORDS
CPU_MILLISECONDS
PHYSICAL_MEMORY_BYTES
VIRTUAL_MEMORY_BYTES
COMMITTED_HEAP_BYTES
org.apache.hadoop.mapreduce.lib.input.FileInputFormatCounter
BYTES_READ
举例：
jobClient.getJob(jobName).getCounters().getGroup("org.apache.hadoop.mapreduce.FileSystemCounter").getCounter("HDFS_BYTES_WRITTEN")
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