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From "donal zang (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-1472) Add bitmap secondary indexes
Date Mon, 06 Jun 2011 13:21:59 GMT


donal zang commented on CASSANDRA-1472:

I just have some test on the hash way secondary indexes, and found it really slow both for
insertion and query, and there's no count APIs.
So I really hope there will be some more efficient way to do the secondary index.
Though people are using CF way to do secondary index by there own (,
but this loose the map-reduce advantage, and users may have to do lots of things by themselves.

> Add bitmap secondary indexes
> ----------------------------
>                 Key: CASSANDRA-1472
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Stu Hood
>            Assignee: Stu Hood
>             Fix For: 1.0
>         Attachments: 0.7-1472-v5.tgz, 0.7-1472-v6.tgz, 0001-CASSANDRA-1472-rebased-to-0.7-branch.txt,
0019-Rename-bugfixes-and-fileclose.txt, 1472-v3.tgz, 1472-v4.tgz, 1472-v5.tgz, anatomy.png,
> Bitmap indexes are a very efficient structure for dealing with immutable data. We can
take advantage of the fact that SSTables are immutable by attaching them directly to SSTables
as a new component (supported by CASSANDRA-1471).

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