[HBASE-9080] Retain assignment should be used when re-enabling table(s) - ASF JIRA

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Details

Type: Bug
Status: Closed
Priority: Critical
Resolution: Fixed
Affects Version/s: 0.94.10
Fix Version/s: 0.94.11
Component/s: None
Labels:
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Hadoop Flags:

Reviewed
Release Note:

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To achieve good data locality, retain assignment is used when re-enabling tables.

hbase.master.enabletable.roundrobin is no longer effective.

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To achieve good data locality, retain assignment is used when re-enabling tables. hbase.master.enabletable.roundrobin is no longer effective.

Description

Region servers are picked in round robin fashion when a table is re-enabled.

This results in poor data locality.

We should use retain assignment when re-enabling table(s).

For initial discussion, see ~~HBASE-6143~~
Since patches for 0.94 and trunk may turn out to be very different, this JIRA is for fixing the issue in 0.94 branch.

Thanks Lars, Elliot, Vladmir and Stack for providing opinions on this subject.