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From Stack <st...@duboce.net>
Subject Re: Is there an easy way to check HFile locality in HDFS?
Date Fri, 16 Dec 2011 23:11:39 GMT
On Thu, Dec 15, 2011 at 9:50 PM, Bruce Bian <weidong.ban@gmail.com> wrote:
> Hi,
> some disks of one node in my hbase cluster were broken, and after I mounted
> some new ones and start regionserver/datanode on that node again, there
> can't be data locality anymore unless I trigger a major_compaction on the
> table manually(datanode/regionserver share the same physical node)
> My question is, is there an easy way to check that all the regionservers
> have a copy of its regions on the same physical node,like a script or
> command,or else where to get the information so I can write one? I know
>  the region info is stored in the .META. table, how about the region's
> hfile blocks?


In 0.92, there is a locality metric that tells you how much of the
regionserver load is local as a percentage that shows in the
regionserver UI.

St.Ack

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