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Posted to commits@cassandra.apache.org by "T Jake Luciani (JIRA)" <ji...@apache.org> on 2010/10/23 02:53:19 UTC
[jira] Issue Comment Edited: (CASSANDRA-1651) Improve read
performance by using byte array slabs
[ https://issues.apache.org/jira/browse/CASSANDRA-1651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924064#action_12924064 ]
T Jake Luciani edited comment on CASSANDRA-1651 at 10/22/10 8:52 PM:
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Right, this was simply an attempt to get this started. I'm happy to keep going.
Also, the patch also works with FBUtilities.readByteArray() which is used for column deserialization.
was (Author: tjake):
Right, this was simply an attempt to get this started. I'm happy to keep going.
> Improve read performance by using byte array slabs
> --------------------------------------------------
>
> Key: CASSANDRA-1651
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1651
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: T Jake Luciani
> Assignee: T Jake Luciani
> Priority: Minor
> Fix For: 0.7.1
>
> Attachments: 1651_v1.txt
>
>
> Now that the code has switched to byte buffers internally, it should be possible to improve read performance by reducing the number of byte array allocations.
> This patch accomplishes this by and re-using sections of a larger byte array slab.
> I've benchmarked it locally and seen a slight improvement on reads, a larger scale benchmark should be performed.
> Also the size of a slab can be configured in cassandra.yaml
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