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From "Stu Hood (JIRA)" <>
Subject [jira] Commented: (CASSANDRA-1472) Add bitmap secondary indexes
Date Tue, 11 Jan 2011 10:31:51 GMT


Stu Hood commented on CASSANDRA-1472:

Summary of tickets to open post commit:
* Online indexing
* Use sampling to improve bin selection and eliminate lumpy bins
* Consider/benchmark replacing memtable brute-force-filtering with an in-memory secondary
* Implement OrBiC projection (note that this also benefits from compression and a block based
format as provided by Avro)
* Expose index metrics via JMX
* Handle BMT gracefully

> Add bitmap secondary indexes
> ----------------------------
>                 Key: CASSANDRA-1472
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Stu Hood
>            Assignee: Stu Hood
>             Fix For: 0.7.1
>         Attachments: 0.7-1472-v5.tgz, 0.7-1472-v6.tgz, 0019-Rename-bugfixes-and-fileclose.txt,
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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