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https://issues.apache.org/jira/browse/HBASE-12859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lars Hofhansl updated HBASE-12859:
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Attachment: 12859-v6.txt
v6 fixes test failures and long line (in non-generated code).
One thing to note, each HFileBlock will now consume an extra 8 bytes on the
heap, for a timestamp that it does not need (HFileContext is used for readers,
writers, and block).
Not a problem, I think, but something to be aware of.
> 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-v6.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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