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https://issues.apache.org/jira/browse/HBASE-2231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13626082#comment-13626082
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Sergey Shelukhin commented on HBASE-2231:
-----------------------------------------
is there any documentation on how IO fencing is supposed to work in HBase? It
wouldn't surprise me if you can still append to a moved file given how HDFS
works.
> Compaction events should be written to HLog
> -------------------------------------------
>
> Key: HBASE-2231
> URL: https://issues.apache.org/jira/browse/HBASE-2231
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: Todd Lipcon
> Assignee: stack
> Priority: Blocker
> Labels: moved_from_0_20_5
> Fix For: 0.95.1
>
> Attachments: 2231-testcase-0.94.txt, 2231-testcase_v2.txt,
> 2231-testcase_v3.txt, 2231v2.txt, 2231v3.txt, 2231v4.txt,
> hbase-2231-testcase.txt, hbase-2231.txt
>
>
> The sequence for a compaction should look like this:
> # Compact region to "new" files
> # Write a "Compacted Region" entry to the HLog
> # Delete "old" files
> This deals with a case where the RS has paused between step 1 and 2 and the
> regions have since been reassigned.
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