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Posted to hdfs-issues@hadoop.apache.org by "Vinay (JIRA)" <ji...@apache.org> on 2013/09/11 09:02:53 UTC
[jira] [Updated] (HDFS-5031) BlockScanner scans the block multiple
times and on restart scans everything
[ https://issues.apache.org/jira/browse/HDFS-5031?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vinay updated HDFS-5031:
------------------------
Attachment: HDFS-5031.patch
Updated patch with comments
> BlockScanner scans the block multiple times and on restart scans everything
> ---------------------------------------------------------------------------
>
> Key: HDFS-5031
> URL: https://issues.apache.org/jira/browse/HDFS-5031
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 3.0.0, 2.1.0-beta
> Reporter: Vinay
> Assignee: Vinay
> Attachments: HDFS-5031.patch, HDFS-5031.patch
>
>
> BlockScanner scans the block twice, also on restart of datanode scans everything.
> Steps:
> 1. Write blocks with interval of more than 5 seconds. write new block on completion of scan for written block.
> Each time datanode scans new block, it also scans, previous block which is already scanned.
> Now after restart, datanode scans all blocks again.
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