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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1714) zero-copy reads
Date Thu, 06 Jan 2011 15:46:46 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12978373#action_12978373
] 

Jonathan Ellis commented on CASSANDRA-1714:
-------------------------------------------

we need to clean the renames and other unrelated changes out of this patch and submit separately.

> 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: CASSANDRA-1714-v2.patch, CASSANDRA-1714.patch, zerocopy.txt
>
>   Original Estimate: 32h
>  Remaining Estimate: 32h
>
> 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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