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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-4657) Limit the number of blocks logged by the NN after a block report to a configurable value.
Date Tue, 16 Jul 2013 19:22:50 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Colin Patrick McCabe updated HDFS-4657:
---------------------------------------

    Summary: Limit the number of blocks logged by the NN after a block report to a configurable
value.  (was: If incremental BR is received before first full BR NN will log a line for every
block on a DN)
    
> Limit the number of blocks logged by the NN after a block report to a configurable value.
> -----------------------------------------------------------------------------------------
>
>                 Key: HDFS-4657
>                 URL: https://issues.apache.org/jira/browse/HDFS-4657
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.0.4-alpha
>            Reporter: Aaron T. Myers
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-4657.patch
>
>
> If incremental BR is received before first full BR NN will log a line for every block
on a DN.
> This can impact restart times pretty substantially if the DNs have a lot of blocks, and
since the FSNS write lock is held while processing the block report clients will not make
any progress.

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