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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-4773) Fix bugs in quota usage updating/computation
Date Mon, 29 Apr 2013 22:04:16 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4773?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo (Nicholas), SZE resolved HDFS-4773.
------------------------------------------

       Resolution: Fixed
    Fix Version/s: Snapshot (HDFS-2802)

I have committed this.  Thanks, Jing!
                
> Fix bugs in quota usage updating/computation
> --------------------------------------------
>
>                 Key: HDFS-4773
>                 URL: https://issues.apache.org/jira/browse/HDFS-4773
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, namenode
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>            Priority: Minor
>             Fix For: Snapshot (HDFS-2802)
>
>         Attachments: HDFS-4773.001.patch, HDFS-4773.002.patch, HDFS-4773.003.patch
>
>
> 1. FileWithSnapshot#updateQuotaAndCollectBlocks did not consider the scenario that all
the snapshots has been deleted from a snapshot copy of deleted file. This may lead to a divide-by-0
error.
> 2. When computing the quota usage for a WithName node and its subtree, if the snapshot
associated with the WithName node at the time of rename operation has been deleted, we should
compute the quota based on the posterior snapshot.

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