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From James Taylor <jtay...@salesforce.com>
Subject Re: HBase aggregate query
Date Tue, 11 Sep 2012 00:49:23 GMT
iwannaplay games <funnlearnforkids@...> writes:
> 
> Hi ,
> 
> I want to run query like
> 
> select month(eventdate),scene,count(1),sum(timespent) from eventlog
> group by month(eventdate),scene
> 
> in hbase.Through hive its taking a lot of time for 40 million
> records.Do we have any syntax in hbase to find its result?In sql
> server it takes around 9 minutes,How long it might take in hbase??
> 
> Regards
> Prabhjot
> 
> 

Hi,
In our internal testing using server-side coprocessors for aggregation, we've
found HBase can process these types of queries very quickly: ~10-12 seconds
using a four node cluster. You need to chunk up and parallelize the work on the
client side to get this kind of performance, though.
Regards,

James




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