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https://issues.apache.org/jira/browse/HDFS-265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12757764#action_12757764
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Konstantin Shvachko commented on HDFS-265:
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Stack, Ryan: It's a bit early. The append branch is still very dynamic - a lot 
of changes is going in. The plan is to stabilize it by the end of Sept. and ask 
people to try it then. It will be too easy to break it right now - no fun for 
you. Code reviews are welcome any time.

> Revisit append
> --------------
>
>                 Key: HDFS-265
>                 URL: https://issues.apache.org/jira/browse/HDFS-265
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: Append Branch
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: Append Branch
>
>         Attachments: appendDesign.pdf, appendDesign.pdf, appendDesign1.pdf, 
> appendDesign2.pdf, AppendSpec.pdf, 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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