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https://issues.apache.org/jira/browse/HDFS-265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12846704#action_12846704
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ryan rawson commented on HDFS-265:
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The head of the mail conversation is here:

http://mail-archives.apache.org/mod_mbox/hadoop-general/201002.mbox/<dfe484f01002161412h8bc953axee2a73d81a234...@mail.gmail.com>

There was no close to the discussion.  At this point there does not seem to be 
any plans for Hadoop 0.21. 

> Revisit append
> --------------
>
>                 Key: HDFS-265
>                 URL: https://issues.apache.org/jira/browse/HDFS-265
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 0.21.0
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: 0.21.0
>
>         Attachments: a.sh, appendDesign.pdf, appendDesign.pdf, 
> appendDesign1.pdf, appendDesign2.pdf, AppendSpec.pdf, AppendTestPlan.html, 
> AppendTestPlan.html, AppendTestPlan.html, AppendTestPlan.html, 
> AppendTestPlan.html, AppendTestPlan.html, AppendTestPlan.html, 
> AppendTestPlan.html, AppendTestPlan.html, TestPlanAppend.html
>
>
> HADOOP-1700 and related issues have put a lot of efforts to provide the first 
> implementation of append. However, append is such a complex feature. It turns 
> out that there are issues that were initially seemed trivial but needs a 
> careful design. This jira revisits append, aiming for a design and 
> implementation supporting a semantics that are acceptable to its users.

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