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From Pradeep Gollakota <pradeep...@gmail.com>
Subject Re: secondary index feature
Date Sun, 22 Dec 2013 15:53:00 GMT
Take a look at this library from Huawei. They went a step further to
colocate the index with the primary partition. I believe Phoenix uses it
for its indexing.

https://github.com/Huawei-Hadoop/hindex


On Sun, Dec 22, 2013 at 1:34 PM, Ted Yu <yuzhihong@gmail.com> wrote:

> Rajeshbabu is working on HBASE-10222 which adds support of secondary index
> to HBASE core.
>
> FYI
>
> On Dec 22, 2013, at 2:11 AM, Henning Blohm <henning.blohm@zfabrik.de>
> wrote:
>
> > Lately we have added a secondary index feature to a persistence tier
> over HBASE. Essentially we implemented what is described as "Dual-Write
> Secondary Index" in http://hbase.apache.org/book/secondary.indexes.html.
> I.e. while updating an entity, actually before writing the actual update,
> indexes are updated. Lookup via the index ignores stale entries. A
> recurring rebuild and clean out of stale entries takes care the indexes are
> trimmed and accurate.
> >
> > None of this was terribly complex to implement. In fact, it seemed like
> something you could do generically, maybe not on the HBASE level itself,
> but as a toolbox / utility style library.
> >
> > Is anybody on the list aware of anything useful already existing in that
> space?
> >
> > Thanks,
> > Henning Blohm
> >
> > *ZFabrik Software KG*
> >
> > T:    +49 6227 3984255
> > F:    +49 6227 3984254
> > M:    +49 1781891820
> >
> > Lammstrasse 2 69190 Walldorf
> >
> > henning.blohm@zfabrik.de <mailto:henning.blohm@zfabrik.de>
> > Linkedin <http://www.linkedin.com/pub/henning-blohm/0/7b5/628>
> > ZFabrik <http://www.zfabrik.de>
> > Blog <http://www.z2-environment.net/blog>
> > Z2-Environment <http://www.z2-environment.eu>
> > Z2 Wiki <http://redmine.z2-environment.net>
> >
>

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