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From lei liu <liulei...@gmail.com>
Subject Re: throughput metrics in hadoop-2.0.5
Date Tue, 06 Aug 2013 10:15:19 GMT
Is  the the value of MutableCounterLong class  set to zero per 10 seconds?


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

> Is  the the value of MutableCounterLong class  set to zreo per 10 seconds?
>
>
> 2013/8/6 lei liu <liulei412@gmail.com>
>
>> 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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