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From Andrew Purtell <apurt...@apache.org>
Subject Re: HBase and Datawarehouse
Date Mon, 29 Apr 2013 18:08:43 GMT
> HBase is not really intended for heavy data crunching

Yes it is. This is why we have first class MapReduce integration and
optimized scanners.

Recent versions, like 0.94, also do pretty well with the 'O' part of OLAP.

Urban Airship's Datacube is an example of a successful OLAP project
implemented on HBase: http://github.com/urbanairship/datacube

"Urban Airship uses the datacube project to support its analytics stack for
mobile apps. We handle about ~10K events per second per node."

Also there is Adobe's SaasBase:


Where an HBase OLAP application will differ tremendously from a traditional
data warehouse is of course in the interface to the datastore. You have to
design and speak in the language of the HBase API, though Phoenix (
https://github.com/forcedotcom/phoenix) is changing that.

On Sun, Apr 28, 2013 at 10:21 PM, anil gupta <anilgupta84@gmail.com> wrote:

> Hi Kiran,
> In HBase the data is denormalized but at the core HBase is KeyValue based
> database meant for lookups or queries that expect response in milliseconds.
> OLAP i.e. data warehouse usually involves heavy data crunching. HBase is
> not really intended for heavy data crunching. If you want to just store
> denoramlized data and do simple queries then HBase is good. For OLAP kind
> of stuff, you can make HBase work but IMO you will be better off using Hive
> for  data warehousing.
> HTH,
> Anil Gupta
> On Sun, Apr 28, 2013 at 8:39 PM, Kiran <kiranvk2011@gmail.com> wrote:
> > But in HBase data can be said to be in  denormalised state as the
> > methodology
> > used for storage is a (column family:column) based flexible schema .Also,
> > from Google's  big table paper it is evident that HBase is capable of
> doing
> > OLAP.SO where does the difference lie?
> >
> >
> >
> > --
> > View this message in context:
> >
> http://apache-hbase.679495.n3.nabble.com/HBase-and-Datawarehouse-tp4043172p4043216.html
> > Sent from the HBase User mailing list archive at Nabble.com.
> >

Best regards,

   - Andy

Problems worthy of attack prove their worth by hitting back. - Piet Hein
(via Tom White)

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