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https://issues.apache.org/jira/browse/HBASE-9039?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Stack resolved HBASE-9039.
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Resolution: Later
> During recovery, perform assignment and distributed log replay in parallel
> --------------------------------------------------------------------------
>
> Key: HBASE-9039
> URL: https://issues.apache.org/jira/browse/HBASE-9039
> Project: HBase
> Issue Type: Improvement
> Reporter: Devaraj Das
> Assignee: Devaraj Das
> Priority: Minor
>
> In the ServerShutDownHandler, the log replay starts only after all the
> regions have been assigned. It might make sense to do the log replay as and
> when assignment happens for the regions rather than wait for the batch of
> assignments to complete. As part of region opening, the store files are read,
> and if a certain store file block is on a slow datanode, it slows down the
> assignment process. Maybe this can be amortized by having the log replay in
> parallel.
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