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https://issues.apache.org/jira/browse/HBASE-12988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14609320#comment-14609320
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Lars Hofhansl commented on HBASE-12988:
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Maybe the best answer is to two this in two jiras.
# HRegion grouping here, with maybe a slight change to default threads to 1 at
least in 0.98 and 1.0 along with some enhanced logic to deal with the single
threaded cases without scheduling tasks on the threadpool.
# A new jira for a more complicated refactoring of the replication code, doing
what I describe above.
> [Replication]Parallel apply edits on row-level
> ----------------------------------------------
>
> Key: HBASE-12988
> URL: https://issues.apache.org/jira/browse/HBASE-12988
> Project: HBase
> Issue Type: Improvement
> Components: Replication
> Reporter: hongyu bi
> Assignee: Lars Hofhansl
> Attachments: 12988-v2.txt, 12988-v3.txt, 12988.txt,
> HBASE-12988-0.98.patch, ParallelReplication-v2.txt
>
>
> we can apply edits to slave cluster in parallel on table-level to speed up
> replication .
> update : per conversation blow , it's better to apply edits on row-level in
> parallel
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