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https://issues.apache.org/jira/browse/HBASE-23286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16973864#comment-16973864
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Guanghao Zhang commented on HBASE-23286:
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{quote}How does this relate to improving MTTR?
{quote}
DLS do 2 times reads and writes:
# Read the WAL and write to recovered edits.
# Read the recovered edits and flush to hfile.
The new proposal only do 1 times reads and writes. Read the WAL and write to
recovered hfiles. The bulkload step only rename the recovered hfiles to real
hfiles.
> Improve MTTR: Split WAL to HFile
> --------------------------------
>
> Key: HBASE-23286
> URL: https://issues.apache.org/jira/browse/HBASE-23286
> Project: HBase
> Issue Type: Improvement
> Components: MTTR
> Reporter: Guanghao Zhang
> Assignee: Guanghao Zhang
> Priority: Major
>
> After HBASE-20724, the compaction event marker is not used anymore when
> failover. So our new proposal is split WAL to HFile to imporve MTTR. It has 3
> steps:
> # Read WAL and write HFile to region’s column family’s recovered.hfiles
> directory.
> # Open region.
> # Bulkload the recovered.hfiles for every column family.
> The design doc was attathed by a google doc. Any suggestions are welcomed.
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