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From Bradford Stephens <bradfordsteph...@gmail.com>
Subject Re: HBase Write to Regionservers behavior
Date Fri, 12 Jun 2009 05:42:18 GMT
About 70.

On Thu, Jun 11, 2009 at 10:24 PM, stack<stack@duboce.net> wrote:
> Hey, how many regions?  (smile)
> St.Ack
>
> On Thu, Jun 11, 2009 at 10:19 PM, Bradford Stephens <
> bradfordstephens@gmail.com> wrote:
>
>> I meant, here 'till Midnight :) thanks!
>>
>> On Thu, Jun 11, 2009 at 10:19 PM, Bradford
>> Stephens<bradfordstephens@gmail.com> wrote:
>> > That actually make a lot of sense. Thanks, awesome people! Me and the
>> > dev team are here to get Katta + HBase to play together, and it's
>> > looking pretty nice.
>> >
>> > On Thu, Jun 11, 2009 at 9:47 PM, stack<stack@duboce.net> wrote:
>> >> On Thu, Jun 11, 2009 at 6:10 PM, Bradford Stephens <
>> >> bradfordstephens@gmail.com> wrote:
>> >>
>> >>>
>> >>> What I'm noticing is that it's writing to mostly one or two regions
on
>> >>> one box at a time, even though I have 7 reducers running. Monitoring
>> >>> everything with dstat -v, I notice that only 2 of my servers are doing
>> >>> much. These boxes have very low CPU idling, and high disk output (a
>> >>> few GB a minute).
>> >>>
>> >>
>> >>
>> >> How many regions in your table?
>> >>
>> >> At first, there is one.  All reducers will go against it.   When it
>> splits,
>> >> then two regions field the 7 reducers and so on.
>> >>
>> >> You can manually split regions from the command-line.  See if that
>> helps:
>> >>
>> >> hbase> split_region 'REGIONNAME'
>> >>
>> >> (IIRC -- type 'tools' in shell for help on the admin facilities).
>> >>
>> >> St.Ack
>> >>
>> >
>>
>

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