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Posted to dev@tajo.apache.org by "Hyunsik Choi (JIRA)" <ji...@apache.org> on 2013/09/14 10:49:57 UTC
[jira] [Commented] (TAJO-181) Improvement of disk scheduler policy
for straggler disk
[ https://issues.apache.org/jira/browse/TAJO-181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13767417#comment-13767417 ]
Hyunsik Choi commented on TAJO-181:
-----------------------------------
+1
The patch looks reasonable.
> Improvement of disk scheduler policy for straggler disk
> -------------------------------------------------------
>
> Key: TAJO-181
> URL: https://issues.apache.org/jira/browse/TAJO-181
> Project: Tajo
> Issue Type: Improvement
> Components: storage
> Affects Versions: 0.2-incubating
> Reporter: hyoungjunkim
> Assignee: hyoungjunkim
> Priority: Minor
> Attachments: TAJO-181.patch
>
>
> Current new StorageManager assigns to DiskScanScheduler with disk id regardless of each DiskScanScheduler's queue size. This policy is the cause of poor performance.
> If some DiskScanScheduler is empty, the DiskScanScheduler is assigned a priority.
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