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https://issues.apache.org/jira/browse/HDFS-12008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16063658#comment-16063658
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Kihwal Lee commented on HDFS-12008:
-----------------------------------
Test failures are not caused by the patch. {{TestFsDatasetImpl}} failed when I
ran without the patch. HDFS-12040.
{{TestDataNodeVolumeFailureReporting}} seems flaky and times out occasionally.
HDFS-11488.
All other tests pass consistently when run locally.
> Improve the available-space block placement policy
> --------------------------------------------------
>
> Key: HDFS-12008
> URL: https://issues.apache.org/jira/browse/HDFS-12008
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: block placement
> Affects Versions: 2.8.1
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Attachments: HDFS-12008.patch, HDFS-12008.v2.branch-2.patch,
> HDFS-12008.v2.trunk.patch, HDFS-12008.v2.trunk.patch,
> RandomAllocationPolicy.png
>
>
> AvailableSpaceBlockPlacementPolicy currently picks two nodes unconditionally,
> then picks one node. It could avoid picking the second node when not
> necessary.
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