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https://issues.apache.org/jira/browse/HBASE-7741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13572942#comment-13572942
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Jimmy Xiang commented on HBASE-7741:
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It is read from configuration and passed to bulk assigner from AM. It won't
wait for ever if waitTillAllAssigned is set to true. It will time out in some
time if some regions stuck in transition. Since nobody depends on the regions
to be assigned, I think it is better to let the bulk assigner run and not to
wait for it. This will speed up the starts up a little. If there are several
region servers crash at the same time, this can free up the SSH thread a little
sooner too.
> Don't use bulk assigner if assigning just several regions
> ---------------------------------------------------------
>
> Key: HBASE-7741
> URL: https://issues.apache.org/jira/browse/HBASE-7741
> Project: HBase
> Issue Type: Improvement
> Components: Region Assignment
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Attachments: trunk-7741.patch, trunk-7741_v2.patch,
> trunk-7741_v3_1.patch, trunk-7741_v3.patch
>
>
> If just assign one region, bulk assigner may be slower.
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