hadoop/hadoop-common-project/hadoop-common/src/main/conf/hadoop-metrics2.properties

# syntax: [prefix].[source|sink].[instance].[options]
# See javadoc of package-info.java for org.apache.hadoop.metrics2 for details

*.sink.file.class=org.apache.hadoop.metrics2.sink.FileSink
# default sampling period
*.period=10

# The namenode-metrics.out will contain metrics from all context
#namenode.sink.file.filename=namenode-metrics.out
# Specifying a special sampling period for namenode:
#namenode.sink.*.period=8

#datanode.sink.file.filename=datanode-metrics.out

# the following example split metrics of different
# context to different sinks (in this case files)
#jobtracker.sink.file_jvm.context=jvm
#jobtracker.sink.file_jvm.filename=jobtracker-jvm-metrics.out
#jobtracker.sink.file_mapred.context=mapred
#jobtracker.sink.file_mapred.filename=jobtracker-mapred-metrics.out

#tasktracker.sink.file.filename=tasktracker-metrics.out

#maptask.sink.file.filename=maptask-metrics.out

#reducetask.sink.file.filename=reducetask-metrics.out


#
# Below are for sending metrics to Ganglia
#
# for Ganglia 3.0 support
# *.sink.ganglia.class=org.apache.hadoop.metrics2.sink.ganglia.GangliaSink30
#
# for Ganglia 3.1 support
# *.sink.ganglia.class=org.apache.hadoop.metrics2.sink.ganglia.GangliaSink31

# *.sink.ganglia.period=10

# default for supportsparse is false
# *.sink.ganglia.supportsparse=true

#*.sink.ganglia.slope=jvm.metrics.gcCount=zero,jvm.metrics.memHeapUsedM=both
#*.sink.ganglia.dmax=jvm.metrics.threadsBlocked=70,jvm.metrics.memHeapUsedM=40

#namenode.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649

#datanode.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649

#jobtracker.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649

#tasktracker.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649

#maptask.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649

#reducetask.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649