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https://issues.apache.org/jira/browse/HBASE-7055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13546318#comment-13546318
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Sergey Shelukhin commented on HBASE-7055:
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>From the description, the scenario that was used as a basis for this feature
>is just compressing mid-range (in time) data preferentially, and avoiding hot
>data and old data. That makes sense in general case; a specific scenario with
>large improvement that I can think of is for example spiky data uploads, where
>relatively large amount of data gets put at once, and only recent data is
>accessed (not from the last spike but just recent as such). Then it doesn't
>make a lot of sense to compact recent data with old data, and triggering
>compaction after every spike doesn't make sense either. This is pure
>speculation though.
Based on that a more flexible tiered scheme was developed which can also be
applied to other patterns. I am not sure about size tiers applicability.
Would you be ok if we put this as an example scenario in documentation and
javadoc?
[~liyin] [~akashnil07] can you clarify if there are other scenarios, for which
this was
> port HBASE-6371 tier-based compaction from 0.89-fb to trunk - first slice
> (not configurable by cf or dynamically)
> -----------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-7055
> URL: https://issues.apache.org/jira/browse/HBASE-7055
> Project: HBase
> Issue Type: Task
> Components: Compaction
> Affects Versions: 0.96.0
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Fix For: 0.96.0
>
> Attachments: HBASE-6371-squashed.patch, HBASE-6371-v2-squashed.patch,
> HBASE-6371-v3-refactor-only-squashed.patch,
> HBASE-6371-v4-refactor-only-squashed.patch,
> HBASE-6371-v5-refactor-only-squashed.patch, HBASE-7055-v0.patch,
> HBASE-7055-v1.patch, HBASE-7055-v2.patch, HBASE-7055-v3.patch,
> HBASE-7055-v4.patch, HBASE-7055-v5.patch
>
>
> There's divergence in the code :(
> See HBASE-6371 for details.
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