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Posted to hdfs-issues@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2014/06/12 19:43:03 UTC

[jira] [Assigned] (HDFS-3528) Use native CRC32 in DFS write path

     [ https://issues.apache.org/jira/browse/HDFS-3528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon reassigned HDFS-3528:
---------------------------------

    Assignee: James Thomas  (was: Todd Lipcon)

> Use native CRC32 in DFS write path
> ----------------------------------
>
>                 Key: HDFS-3528
>                 URL: https://issues.apache.org/jira/browse/HDFS-3528
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode, hdfs-client, performance
>    Affects Versions: 2.0.0-alpha
>            Reporter: Todd Lipcon
>            Assignee: James Thomas
>         Attachments: HDFS-3528.patch
>
>
> HDFS-2080 improved the CPU efficiency of the read path by using native SSE-enabled code for CRC verification. Benchmarks of the write path show that it's often CPU bound by checksums as well, so we should make the same improvement there.



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