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From "Kevin O'Dell" <ke...@rocana.com>
Subject Re: hbase datalocality while running mapreduce
Date Tue, 09 May 2017 15:02:15 GMT
Hi Rajeshkumar,

  When you execute a MR job over an HBase table, the reads should be
local(assuming you have good locality now). This is occurs because writes
are sent to the RegionServer that owns the particular Region. Once the
writes occur the block are written to the local DataNode first. Even if
locality gets messed up through RegionServer failures Major Compactions
should restore it.

On Tue, May 9, 2017 at 8:00 AM, Rajeshkumar J <rajeshkumarit8292@gmail.com>
wrote:

> Hi,
>
>
>    I have a table with its region max file size is 10 gb. If i run any
> mapreduce over this table whether there will be any data locality. If not
> please explain
>
> Thanks
>



-- 
Kevin O'Dell
Field Engineer
850-496-1298 | Kevin@rocana.com
@kevinrodell
<http://www.rocana.com>

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