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From lei liu <liulei...@gmail.com>
Subject Re: throughput metrics in hadoop-2.0.5
Date Tue, 06 Aug 2013 10:11:01 GMT
There is "@Metric MutableCounterLong fsyncCount" metrics in
DataNodeMetrics, the MutableCounterLong class continuously increase the
value, so I think the value in ganglia should be "10, 20 ,30, 40" and so
on.  but  the value the value is fsyncCount.value/10, that is in  "1 ,1 , 1
, 1"  in ganglia.

 How does ganglia  to display the value of MutableCounterLong class? Is
that "fsyncCount.value" or "fsyncCount.value/10"?




2013/8/6 lei liu <liulei412@gmail.com>

> I use hadoop-2.0.5 and config hadoop-metrics2.properties file with below
> content.
> *.sink.ganglia.class=org.apache.hadoop.metrics2.sink.ganglia.GangliaSink31
> *.sink.ganglia.period=10
> *.sink.ganglia.supportsparse=true
> namenode.sink.ganglia.servers=10.232.98.74:8649
> datanode.sink.ganglia.servers=10.232.98.74:8649
>
> I write one programme that call FSDataOutputStream.hsync() method once
> per second.
>
> There is "@Metric MutableCounterLong fsyncCount" metrics in
> DataNodeMetrics, the MutableCounterLong class continuously increase the
> value, so I think the value in ganglia should be 10, 20 ,30, 40 and so on.
> but  the value in ganglia is below:
>
>
> [image: dw62.kgb.sqa.cm4 dfs.datanode.FsyncCount]
>
>
> I want to know the ganglia how to display the value of MutableCounterLong
> class?
>
> Thanks,
>
> LiuLei
>

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