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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1714) zero-copy reads
Date Sat, 15 Jan 2011 02:45:47 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12982009#action_12982009
] 

Hudson commented on CASSANDRA-1714:
-----------------------------------

Integrated in Cassandra-0.7 #160 (See [https://hudson.apache.org/hudson/job/Cassandra-0.7/160/])
    zero-copy reads
Patch by Pavel Yaskevich; Reviewed by Jake Luciani for CASSANDRA-1714


> zero-copy reads
> ---------------
>
>                 Key: CASSANDRA-1714
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1714
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Pavel Yaskevich
>             Fix For: 0.7.1
>
>         Attachments: 1714-v5-07.txt, CASSANDRA-1714-0.7.patch, CASSANDRA-1714-v2.patch,
CASSANDRA-1714-v3.patch, CASSANDRA-1714-v4-trunk.patch, CASSANDRA-1714-v6-0.7.patch, CASSANDRA-1714.patch,
zerocopy.txt
>
>   Original Estimate: 32h
>          Time Spent: 32h
>  Remaining Estimate: 0h
>
> Since we are already using mmap'd ByteBuffers in MappedFileDataInput we should be able
to do zero-copy reads (via buffer.slice()), which would give us better performance than CASSANDRA-1651
without having to worry about buffer management.

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