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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6865) Snapshot File Cleaners
Date Tue, 06 Nov 2012 20:42:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13491793#comment-13491793

Jonathan Hsieh commented on HBASE-6865:

High order bits.  from v2

1) There is a cache for hfile directory listings and a separate cache for hlog file directory
2) There are two main caches likely get plugged into the archive cleaner (but it doesn't seem
to happen in this patch).
4) There are some a non standard use of a setter that is in the is a limitation of the cleaner
api.  There should be a follow on issue to help that be more conventional.

> Snapshot File Cleaners
> ----------------------
>                 Key: HBASE-6865
>                 URL: https://issues.apache.org/jira/browse/HBASE-6865
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Jesse Yates
>            Assignee: Jesse Yates
>             Fix For: hbase-6055
> HFile and HLog cleaners are necessary for fully implementing snapshots, but can be broken
out into their own piece really cleanly. The HFile cleaner is necessary for both timestamp
and globally consistent snapshots, but the HLog cleaner is necessary for globally consistent
and offline snapshots. 
> Putting everything together in one patch isn't too much overload as there is a lot of
overlap between the cleaners.

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