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From kisalay <kisa...@gmail.com>
Subject Re: HBase for ad-hoc aggregate queries
Date Wed, 11 Jan 2012 19:10:05 GMT
U can have a look at opentsdb which does aggregations on the data:
Also, you can use endpoint coprocessors to do aggregations on a per region
and then merge the results.

Both of these approaches will give you alternatives apart from traditional

On Thu, Jan 12, 2012 at 12:29 AM, kfarmer <kfarmer@camstar.com> wrote:

> I'm taking a look at moving our datastore from Oracle to HBase, and trying
> to
> understand how HBase could be used for ad-hoc aggregation queries across
> our
> data.
> My understanding is MapReduce is more of a batch framework, so if we want a
> query to come back to the user's request in a few seconds, that won't work
> because of the overheard of running MR and because the MR jobs write back
> to
> a new table.  Is that correct?
> Instead should we be pre-aggregating data as we load into separate tables,
> and then when a user queries instead just do a scan on these pre-aggregated
> tables?
> Thanks.
> --
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> Sent from the HBase User mailing list archive at Nabble.com.

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