[
https://issues.apache.org/jira/browse/HBASE-4742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13144889#comment-13144889
]
Phabricator commented on HBASE-4742:
------------------------------------
Liyin has commented on the revision "[jira] [HBASE-4742] Split dead server's
log in parallel".
Kannan, Mikhail, Prakash and Ted,
How about batch all the dead servers in a blocking queue and only launch one
thread in HMaster to distributed log splitting these dead regions together.
The interface of distributed log splitting is:
public void splitLog(final List<String> serverNames) {}
So it naturally designed to split a list region servers.
The reason I proposed this idea is because the function to split log in
HMaster is not well-tested in a multithread situations.
It may involve some race condition when 2 threads are going to distributed
log splitting for 2 different dead region servers.
If the master split dead servers log in batch in a single thread, then we can
avoid these potential problems and also matches our original motivations.
What do you guys think?
Thanks
Liyin
REVISION DETAIL
https://reviews.facebook.net/D237
> Split dead server's log in parallel
> -----------------------------------
>
> Key: HBASE-4742
> URL: https://issues.apache.org/jira/browse/HBASE-4742
> Project: HBase
> Issue Type: Improvement
> Reporter: Liyin Tang
> Assignee: Liyin Tang
> Attachments: D237.1.patch, D237.2.patch, D237.3.patch, D237.4.patch
>
>
> When one region server goes down, the master will shutdown the region server
> and split its log.
> However, splitting log is a blocking call and it would take some time.
> If more than one region server go down, the master will split its log one by
> one, which is not efficient.
> Since we have the distributed log split, we could split these logs from the
> dead servers in parallel.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
