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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2013/03/28 21:43:15 UTC
[jira] [Commented] (HBASE-4391) Add ability to start RS as root and
call mlockall
[ https://issues.apache.org/jira/browse/HBASE-4391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13616626#comment-13616626 ]
stack commented on HBASE-4391:
------------------------------
I added a note under the hbase tools section on this facility.
> Add ability to start RS as root and call mlockall
> -------------------------------------------------
>
> Key: HBASE-4391
> URL: https://issues.apache.org/jira/browse/HBASE-4391
> Project: HBase
> Issue Type: New Feature
> Components: regionserver
> Affects Versions: 0.94.0
> Reporter: Todd Lipcon
> Assignee: Matteo Bertozzi
> Fix For: 0.95.0
>
> Attachments: 4391-v4.patch, HBASE-4391-v0.patch, HBASE-4391-v1.patch, HBASE-4391-v2.patch, HBASE-4391-v3.patch
>
>
> A common issue we've seen in practice is that users oversubscribe their region servers with too many MR tasks, etc. As soon as the machine starts swapping, the RS grinds to a halt, loses ZK session, aborts, etc.
> This can be combatted by starting the RS as root, calling mlockall(), and then setuid down to the hbase user. We should not require this, but we should provide it as an option.
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