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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7055) port HBASE-6371 tier-based compaction from 0.89-fb to trunk
Date Wed, 31 Oct 2012 20:27:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7055?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13488195#comment-13488195

Sergey Shelukhin commented on HBASE-7055:

We discussed with Enis and it seems like this kind of configuration should be stored on table
and column family level; either with some explicit system parameters, or as a blob (similar
to the storing-HCat/etc.-metadata ideas), depending on how we thing about different compaction
policies (system provides a set e.g. the tiered one vs the default one, or they are more pluggable/user-changeable).

Another issue is that the new policy is configured on by default in the xml config (I missed
that), which seems premature since use cases are not 100% clear, in a sense that people might
have different scenarios for what constitutes old data/hot data/lots of data, so it's hard
to come up with reasonable tier defaults.
I will recall the patch for now... 

> port HBASE-6371 tier-based compaction from 0.89-fb to trunk
> -----------------------------------------------------------
>                 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
> There's divergence in the code :(
> See HBASE-6371 for details.

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