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https://issues.apache.org/jira/browse/HBASE-3156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12925150#action_12925150
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Karthik Ranganathan commented on HBASE-3156:
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Awesome! I was thinking of doing this without MR if possible - since each RS
would replay the all HLogs in a directory, there is no need to split files and
then replay the logs...
> Special case distributed log splitting on fresh cluster startup
> ---------------------------------------------------------------
>
> Key: HBASE-3156
> URL: https://issues.apache.org/jira/browse/HBASE-3156
> Project: HBase
> Issue Type: New Feature
> Reporter: Karthik Ranganathan
> Assignee: Karthik Ranganathan
>
> If the entire HBase goes down (not a graceful stop - example namenode dies)
> then on a subsequent restart, the HMaster can hand off the hlog splitting to
> the respective region servers. This would parallelize the log splitting and
> maintain region server hfile locality.
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