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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7294) Check for snapshot file cleaners on start
Date Fri, 07 Dec 2012 16:09:22 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13526484#comment-13526484
] 

Jonathan Hsieh commented on HBASE-7294:
---------------------------------------

The first should be the simplest -- no ability to take snapshots if data loss is possible,
no ability to loss data from existing snapshots, and no "fancy" policies until we get the
basic, default, and definitely correct implementation in first.
                
> Check for snapshot file cleaners on start
> -----------------------------------------
>
>                 Key: HBASE-7294
>                 URL: https://issues.apache.org/jira/browse/HBASE-7294
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, master, regionserver, snapshots, Zookeeper
>    Affects Versions: hbase-6055
>            Reporter: Jesse Yates
>             Fix For: hbase-6055, 0.96.0
>
>
> Snapshots currently use the SnaphotHfileCleaner and SnapshotHLogCleaner to ensure that
any hfiles or hlogs (respectively) that are currently part of a snapshot are not removed from
their respective archive directories (.archive and .oldlogs).
> From Matteo Bertozzi:
> {quote}
> currently the snapshot cleaner is not in hbase-default.xml
> and there's no warning/exception on snapshot/restore operation, if not enabled.
> even if we add the cleaner to the hbase-default.xml how do we ensure that the user doesn't
remove it?
> Do we want to hardcode the cleaner at master startup?
> Do we want to add a check in snapshot/restore that throws an exception if the cleaner
is not enabled?
> {quote}

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