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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7445) Implement bulk checksum verification using efficient native code
Date Wed, 03 Aug 2011 10:18:28 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13078679#comment-13078679
] 

Tsz Wo (Nicholas), SZE commented on HADOOP-7445:
------------------------------------------------

Two quick questions:
- Do we have to include the BSD license if we generate the tables ourselves?
- Have you tested the correctness and performance with our Java implementations?

I will check the patch in more details.

> Implement bulk checksum verification using efficient native code
> ----------------------------------------------------------------
>
>                 Key: HADOOP-7445
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7445
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: native, util
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hadoop-7445.txt, hadoop-7445.txt, hadoop-7445.txt, hadoop-7445.txt
>
>
> Once HADOOP-7444 is implemented ("bulk" API for checksums), good performance gains can
be had by implementing bulk checksum operations using JNI. This JIRA is to add checksum support
to the native libraries. Of course if native libs are not available, it will still fall back
to the pure-Java implementations.

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