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From "Andrei Dragomir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1832) Faster enable/disable/delete
Date Fri, 02 Oct 2009 09:02:23 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12761512#action_12761512
] 

Andrei Dragomir commented on HBASE-1832:
----------------------------------------

As I see in the HBaseAdmin, all the table modification operations go to the master, and everything
there is synchronized on the RegionManager on the HMaster. Can we change these semantics ?
What happens if client code disables the table while another client enables it ?

The second observation is that, there are about three or four different patterns in the code
to scan the meta / get a table's regions (MetaScanner, MetaUtils, direct HTable(meta), etc).
I think it would be better to have only one pattern.



> Faster enable/disable/delete
> ----------------------------
>
>                 Key: HBASE-1832
>                 URL: https://issues.apache.org/jira/browse/HBASE-1832
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: stack
>             Fix For: 0.20.1
>
>
> The enable/disable/delete is slow.  Looking at code, its heavyweight.  It doesn't do
bulk scanning nor bulk writing.  Try doing some code client side that does bulk scan and bulk
puts.  It might run faster. 

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