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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2657) Enhancements to DFSClient to support flushing data at any point in time
Date Mon, 10 Mar 2008 07:03:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12576882#action_12576882
] 

Hadoop QA commented on HADOOP-2657:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12377504/flush7.patch
against trunk revision 619744.

    @author +1.  The patch does not contain any @author tags.

    tests included +1.  The patch appears to include 3 new or modified tests.

    javadoc +1.  The javadoc tool did not generate any warning messages.

    javac +1.  The applied patch does not generate any new javac compiler warnings.

    release audit +1.  The applied patch does not generate any new release audit warnings.

    findbugs -1.  The patch appears to introduce 4 new Findbugs warnings.

    core tests +1.  The patch passed core unit tests.

    contrib tests +1.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1925/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1925/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1925/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1925/console

This message is automatically generated.

> Enhancements to DFSClient to support flushing data at any point in time
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-2657
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2657
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>             Fix For: 0.17.0
>
>         Attachments: flush.patch, flush2.patch, flush3.patch, flush4.patch, flush5.patch,
flush6.patch, flush7.patch
>
>
> The HDFS Append Design (HADOOP-1700) requires that there be a public API to flush data
written to a HDFS file that can be invoked by an application. This API (popularly referred
to a fflush(OutputStream)) will ensure that data written to the DFSOutputStream is flushed
to datanodes and any required metadata is persisted on Namenode.
> This API has to handle the case when the client decides to flush after writing data that
is not a exact multiple of io.bytes.per.checksum.

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