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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-7791) Compaction USER_PRIORITY is slightly broken
Date Tue, 09 Apr 2013 22:40:16 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergey Shelukhin updated HBASE-7791:
------------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)
    
> Compaction USER_PRIORITY is slightly broken
> -------------------------------------------
>
>                 Key: HBASE-7791
>                 URL: https://issues.apache.org/jira/browse/HBASE-7791
>             Project: HBase
>          Issue Type: Bug
>          Components: Compaction
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>            Priority: Minor
>         Attachments: HBASE-7791-v0.patch, HBASE-7791-v1.patch, HBASE-7791-v2.patch
>
>
> The code to get compaction priority is as such:
> {code}   public int getCompactPriority(int priority) {
>      // If this is a user-requested compaction, leave this at the highest priority
>      if(priority == Store.PRIORITY_USER) {
>        return Store.PRIORITY_USER;
>      } else {
>        return this.blockingStoreFileCount - this.storefiles.size();
>      }
>    }
> {code}.
> PRIORITY_USER is 1.
> The priorities are compared as numbers in HRegion, so compactions of blocking stores
will override user priority (probably intended); also, if you have blockingFiles minus one,
your priority is suddenly PRIORITY_USER, which may cause at least this:
>         LOG.debug("Warning, compacting more than " + comConf.getMaxFilesToCompact() +
>             " files because of a user-requested major compaction");
> as well as some misleading logging.

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