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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-1554) Append 0.20: New semantics for recoverLease
Date Mon, 10 Jan 2011 21:36:01 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hairong Kuang updated HDFS-1554:
--------------------------------

    Fix Version/s:     (was: 0.23.0)
                       (was: 0.22.0)
          Summary: Append 0.20: New semantics for recoverLease  (was: New semantics for recoverLease)

> Append 0.20: New semantics for recoverLease
> -------------------------------------------
>
>                 Key: HDFS-1554
>                 URL: https://issues.apache.org/jira/browse/HDFS-1554
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: 0.20-append
>
>         Attachments: appendRecoverLease.patch, appendRecoverLease1.patch
>
>
> Current recoverLease API implemented in append 0.20 aims to provide a lighter weight
(comparing to using create/append) way to trigger a file's soft lease expiration. From both
the use case of hbase and scribe, it could have a stronger semantics: revoking the file's
lease, thus starting lease recovery immediately.
> Also I'd like to port this recoverLease API to HDFS 0.22 and trunk since HBase is moving
to HDFS 0.22.

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