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From Stack <st...@duboce.net>
Subject Re: Job is faster with not cluster than 4 cluster
Date Wed, 09 Mar 2011 20:49:43 GMT
On Wed, Mar 9, 2011 at 1:57 AM, Cavus,M.,Fa. Post Direkt
<M.Cavus@postdirekt.de> wrote:
> Hi,
> I don't have problems on maptasks.

Do the maptasks go to hbase?

> Here are what am I see on my Web Interface:
>
> Region Servers
> Address Start Code Load
> slave1.local:60030 1298907779615 requests=0, regions=16, usedHeap=240,
> maxHeap=8183
> slave2.local:60030 1298907780330 requests=0, regions=16, usedHeap=307,
> maxHeap=8183
> slave3.local:60030 1298907778882 requests=0, regions=15, usedHeap=246,
> maxHeap=8183
> slave4.local:60030 1298907780059 requests=0, regions=16, usedHeap=413,
> maxHeap=8183
> Total:  servers: 4   requests=0, regions=63
>

At what point in the reduce do you see the above?  IIRC only at the
post 66% does reduce start entering data into hbase.  If you are
beyond this point, something else is up.  Try thread dumping a child
task or adding debugging to try narrow in on where the holdup.

St.Ack

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