[jira] Commented: (CASSANDRA-1472) Add bitmap secondary indexes

["Stu Hood (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-1472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12930212#action_12930212 ] 

Stu Hood commented on CASSANDRA-1472:
-------------------------------------

Another TODO item for a future ticket is to push down evaluation of multiple index clauses to the bitmap indexes where possible.

> Add bitmap secondary indexes
> ----------------------------
>
>                 Key: CASSANDRA-1472
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1472
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Stu Hood
>             Fix For: 0.7.1
>
>         Attachments: 1472-v3.tgz, 1472-v4.tgz, 1472-v5.tgz, anatomy.png, v4-bench-c32.txt
>
>
> 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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