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https://issues.apache.org/jira/browse/HADOOP-3981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12630719#action_12630719
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Tsz Wo (Nicholas), SZE commented on HADOOP-3981:
------------------------------------------------
In case that Hudson is not working, here is the ant test-patch results:
{noformat}
[exec] +1 overall.
[exec] +1 @author. The patch does not contain any @author tags.
[exec] +1 tests included. The patch appears to include 6 new or
modified tests.
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
{noformat}
> Need a distributed file checksum algorithm for HDFS
> ---------------------------------------------------
>
> Key: HADOOP-3981
> URL: https://issues.apache.org/jira/browse/HADOOP-3981
> Project: Hadoop Core
> Issue Type: New Feature
> Components: dfs
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: 3981_20080909.patch, 3981_20080910.patch,
> 3981_20080910b.patch, 3981_20080912.patch
>
>
> Traditional message digest algorithms, like MD5, SHA1, etc., require reading
> the entire input message sequentially in a central location. HDFS supports
> large files with multiple tera bytes. The overhead of reading the entire
> file is huge. A distributed file checksum algorithm is needed for HDFS.
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