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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3979) Fix hsync semantics
Date Tue, 06 Nov 2012 22:42:13 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3979?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo (Nicholas), SZE updated HDFS-3979:
-----------------------------------------

    Affects Version/s:     (was: 2.0.0-alpha)
                       2.0.2-alpha
    
> Fix hsync semantics
> -------------------
>
>                 Key: HDFS-3979
>                 URL: https://issues.apache.org/jira/browse/HDFS-3979
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 2.0.2-alpha
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 2.0.3-alpha
>
>         Attachments: hdfs-3979-sketch.txt, hdfs-3979-v2.txt, hdfs-3979-v3.txt, hdfs-3979-v4.txt
>
>
> See discussion in HDFS-744. The actual sync/flush operation in BlockReceiver is not on
a synchronous path from the DFSClient, hence it is possible that a DN loses data that it has
already acknowledged as persisted to a client.
> Edit: Spelling.

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