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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-730) On startup, rinse STARTCODE and SERVER from .META.
Date Tue, 08 Jul 2008 20:57:31 GMT

    [ https://issues.apache.org/jira/browse/HBASE-730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12611793#action_12611793
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Jean-Daniel Cryans commented on HBASE-730:
------------------------------------------

The initialScan has poor chances of being called with metaRegionsToScan filled. So the optimization
will do nothing for a lot of people (and if you have a big cluster, starting it will be long
enough for other reasons). So this modification is out of scope in this jira.

Something doable would be to clear the ROOT table.

> On startup, rinse STARTCODE and SERVER from .META.
> --------------------------------------------------
>
>                 Key: HBASE-730
>                 URL: https://issues.apache.org/jira/browse/HBASE-730
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: stack
>            Assignee: Jean-Daniel Cryans
>             Fix For: 0.2.0
>
>         Attachments: hbase-730-v1.patch
>
>
> Look into what it would take purging startcode and server from .META. on startup.  It
might make startup run faster.  In particular, Clint Morgan was asking for faster startup.
 Below is from a reply.  The +1 is from JK.
> > > Looking at code, we have the concept of an 'initial' scan.  I
> > > wonder if things would run faster for you if on the initial
> > > scan we just cleared all SERVER and STARTCODE entries in
> > > .META. rather than wait on regionserver reports?
> +1

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