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https://issues.apache.org/jira/browse/HBASE-12859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14294303#comment-14294303
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Gary Helmling commented on HBASE-12859:
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+1 on v5 patch. As we discussed, I think this should work for the Tephra case,
subject to some Tephra changes on compaction handling -- we'd need to fail the
compaction if we do not have an up-to-date copy of the transaction state in
order to purge data from invalid transactions. Then we should be able to clear
invalid transaction older than: oldest compaction timestamp for all
transactional tables - transaction state loading delay - transaction timeout.
> Major compaction completion tracker
> -----------------------------------
>
> Key: HBASE-12859
> URL: https://issues.apache.org/jira/browse/HBASE-12859
> Project: HBase
> Issue Type: Brainstorming
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Fix For: 2.0.0, 0.98.10, 1.0.1
>
> Attachments: 12859-v1.txt, 12859-v2.txt, 12859-v3.txt, 12859-v4.txt,
> 12859-v5.txt, 12859-wip-UNFINISHED.txt
>
>
> In various scenarios it is helpful to know a guaranteed timestamp up to which
> all data in a table was major compacted.
> We can do that keeping a major compaction timestamp in META.
> A client then can iterate all region of a table and find a definite
> timestamp, which is the oldest compaction timestamp of any of the regions.
> [~apurtell], [~ghelmling], [~giacomotaylor].
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