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Posted to issues@hbase.apache.org by "Lars Hofhansl (Commented) (JIRA)" <ji...@apache.org> on 2012/01/14 01:42:40 UTC

[jira] [Commented] (HBASE-5199) Delete out of TTL store files before compaction selection

    [ https://issues.apache.org/jira/browse/HBASE-5199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13186029#comment-13186029 ] 

Lars Hofhansl commented on HBASE-5199:
--------------------------------------

Need to pay some special attention to specific delete-marker TTL that FB added (i.e. a delete marker could outlive the TTL of a store). Can't find the jira for that right, but it was committed relatively recently.
                
> Delete out of TTL store files before compaction selection
> ---------------------------------------------------------
>
>                 Key: HBASE-5199
>                 URL: https://issues.apache.org/jira/browse/HBASE-5199
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Liyin Tang
>            Assignee: Liyin Tang
>
> Currently, HBase deletes the out of TTL store files after major compaction. We can change the sequence to delete the out of TTL store files before selecting store files for compactions. 
> In this way, HBase can keep deleting the old invalid store files without major compaction, and also prevent from unnecessary major compactions since the out of TTL store files will be deleted before the compaction selection.

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