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https://issues.apache.org/jira/browse/HDFS-4872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13676101#comment-13676101
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Sanjay Radia commented on HDFS-4872:
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I think we will have to implement the server-side replay-log for some of the
operations anyway. Use of inode numbers could help make its memory usage
smaller.
> Idempotent delete operation.
> ----------------------------
>
> Key: HDFS-4872
> URL: https://issues.apache.org/jira/browse/HDFS-4872
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 2.0.4-alpha
> Reporter: Konstantin Shvachko
>
> Making delete idempotent is important to provide uninterrupted job execution
> in case of HA failover.
> This is to discuss different approaches to idempotent implementation of
> delete.
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