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From "Slava Gorelik" <slava.gore...@gmail.com>
Subject Re: Regionserver fails to serve region
Date Tue, 04 Nov 2008 13:45:07 GMT
Can i run balancer on hadoop during massive load on Hbase ?Last time i did
it i killed my data :-)

On Tue, Nov 4, 2008 at 10:45 AM, Michael Stack <stack@duboce.net> wrote:

> Slava Gorelik wrote:
>
>> Hi Michael.After reformatting HDFS, Hbase started to work as a Swiss
>> Clock.
>> Worked with 8 clients about 30 hours intensive load.
>>
>>
> Thanks for reporting back to the list.
>
>> Just small question, after about 28 hours (when i came back to work) i
>> found
>> that one of 7 datanodes in Hadoop is about 98% usage and all other about
>> 30%, is it normal ?
>>
>>
> I haven't kept a close eye on HDFS usage during hbase upload.  I do know
> that out-of-balance would seem to be a common condition and that its been
> reported on the list that hbase runs faster on a balanced HDFS.  You might
> try out the hadoop balancer.  There's a little note on it here in the hbase
> FAQ: http://wiki.apache.org/hadoop/Hbase/FAQ#7.
>
> St.Ack
>

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