1. File and Ganglia are the only bundled sinks, though there are socket/json (for chukwa) and graphite sinks patches in the works. 2. Hadoop metrics (and metrics2) is mostly designed for system/process metrics, which means you'll need to attach jconsole to your map/reduce task processes to see your task metrics instrumented via metrics. What you actually want is probably custom job counters. 3. You don't need any configuration to use JMX to access metrics2, as JMX is currently on by default. The configuration in hadoop-metrics2.properties is mostly for optional sink configuration and metrics filtering.
__Luke On Wed, Oct 23, 2013 at 4:21 PM, Benyi Wang <bewang.t...@gmail.com> wrote: > 1. Does hadoop metrics2 only support File and Ganglia sink? > 2. Can I expose metrics as JMX, especially for customized metrics? I > created some metrics in my mapreduce job and could successfully output > them using a FileSink. But if I use jconsole to access YARN nodemanager, I > can only see hadoop metrics e.g Hadoop/NodeManager/NodeManagerMetrices > etc., not mine with prefix maptask. How to setup to see maptask/reducetask > prefix metrics? > 3. Is there an example using jmx? I could not find > > The configuration syntax is: > > [prefix].[source|sink|jmx|].[instance].[option] > > > http://hadoop.apache.org/docs/current/api/org/apache/hadoop/metrics2/package-summary.html >
