hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Bradford Stephens <bradfordsteph...@gmail.com>
Subject Re: HBase Write to Regionservers behavior
Date Fri, 12 Jun 2009 05:19:26 GMT
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
>

Mime
View raw message