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https://issues.apache.org/jira/browse/KUDU-3476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17747276#comment-17747276
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ASF subversion and git services commented on KUDU-3476:
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Commit afc82e323b0527ca7b96b51bad6583f935a34e85 in kudu's branch
refs/heads/branch-1.17.x from Mahesh Reddy
[ https://gitbox.apache.org/repos/asf?p=kudu.git;h=afc82e323 ]
KUDU-3476: Update 1.17 release notes
This patch udpates the release notes for the 1.17 release
to include the range aware replica placement feature.
Change-Id: I430cf540731860ec9209f5c6026cdc4431a3d2bf
Reviewed-on: http://gerrit.cloudera.org:8080/20242
Reviewed-by: Yingchun Lai <[email protected]>
Tested-by: Kudu Jenkins
> Make replica placement range and table aware
> --------------------------------------------
>
> Key: KUDU-3476
> URL: https://issues.apache.org/jira/browse/KUDU-3476
> Project: Kudu
> Issue Type: New Feature
> Components: master, tserver
> Reporter: Mahesh Reddy
> Assignee: Mahesh Reddy
> Priority: Major
> Fix For: 1.17.0
>
>
> The current replica placement algorithm uses the power of two choices
> algorithm. This algorithm randomly selects tservers and places the replica on
> the tserver with less replicas. This can lead to potential hotspotting as it
> doesn't discriminate by range or table so many tablets from the same
> range/table can be disproportionally distributed.
> With this new feature, the replicas will be placed in a way that the tablets
> per range will be equally distributed amongst the available tservers. If
> multiple tservers have the same amount of replicas per range, then the
> tserver with less replicas for that table will be selected. If multiple
> tservers have the same amount of replicas for that table, the tserver with
> less total replicas will be chosen.
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