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Date: Mon, 19 May 2008 17:52:55 -0700 (PDT)
From: "Tsz Wo (Nicholas), SZE (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-3310) Lease recovery for append
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     [ https://issues.apache.org/jira/browse/HADOOP-3310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tsz Wo (Nicholas), SZE updated HADOOP-3310:
-------------------------------------------

    Attachment: 3310_20080519b.patch

3310_20080519b.patch: added a test and a few append methods in ClientProtocol, NameNode, FSNamesystem for testing.  Still need more tests.

> Lease recovery for append
> -------------------------
>
>                 Key: HADOOP-3310
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3310
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: 3310_20080514.patch, 3310_20080516b.patch, 3310_20080516c.patch, 3310_20080519.patch, 3310_20080519b.patch
>
>
> In order to support file append, a GenerationStamp is associated with each block.  Lease recovery will be performed when there is a possibility that the replicas of a block in a lease may have different GenerationStamp values.
> For more details, see the documentation in HADOOP-1700.

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