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https://issues.apache.org/jira/browse/HBASE-3329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12970325#action_12970325
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Karthik Ranganathan commented on HBASE-3329:
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@Ryan - didnt get that... At a higher level, I was thinking that the current
steps are:
1. Open and read hlogs
2. Split them and create edits per region files
3. RS that opens the regions reads the split edits files and then dumps them
into hfiles
I was thinking we could change this sequence to something like:
1. Open hlogs
2. Create hfiles for the regions
And that would give us a big gain in not writing and reading the HLogs once
each.
> HLog splitting after RS/cluster death should directly create HFiles
> -------------------------------------------------------------------
>
> Key: HBASE-3329
> URL: https://issues.apache.org/jira/browse/HBASE-3329
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Reporter: Karthik Ranganathan
>
> After a RS dies or the cluster goes down and we are recovering, we first
> split HLogs into the logs for the regions. Then the region servers that host
> the regions replay the logs and open the regions.
> This can be made more efficient by directly creating HFiles from the HLogs
> (instead of producing a split HLogs file).
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