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Date: Mon, 14 Sep 2009 16:38:57 -0700 (PDT)
From: "Hairong Kuang (JIRA)" <jira@apache.org>
To: hdfs-dev@hadoop.apache.org
Subject: [jira] Resolved: (HDFS-589) Change block write protocol to support
 pipeline recovery
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     [ https://issues.apache.org/jira/browse/HDFS-589?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hairong Kuang resolved HDFS-589.
--------------------------------

    Resolution: Fixed

I've just committed this.

> Change block write protocol to support pipeline recovery
> --------------------------------------------------------
>
>                 Key: HDFS-589
>                 URL: https://issues.apache.org/jira/browse/HDFS-589
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node, hdfs client
>    Affects Versions: Append Branch
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: Append Branch
>
>         Attachments: opWriteProtocol.patch, opWriteProtocol1.patch
>
>
> Current block write operation's header has the following fields:
> blockId blockGS pipelineSize isRecovery clientName hasSource source #datanodesInDownStreamPipeline downstreamDatanodes
> I'd like to change the header to be
> blockId blockGS pipelineSize clientName  flags blockMinLen blockMaxLen newGS hasSource source #datanodesInDownStreamPipeline downstreamDatanodes
> With this protocol change, pipeline recovery will be performed when a mew pipeline is set up.

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