hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Pradeep Gollakota <pradeep...@gmail.com>
Subject Re: secondary index feature
Date Sun, 22 Dec 2013 16:00:59 GMT
I lied in my previous email... it doesn't look like Phoenix uses HIndex.


On Sun, Dec 22, 2013 at 3:53 PM, Pradeep Gollakota <pradeepg26@gmail.com>wrote:

> 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>
>> >
>>
>
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message