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From "Nick Dimiduk (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8220) can we record the count opened HTable for HTablePool
Date Tue, 16 Apr 2013 00:14:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13632404#comment-13632404
] 

Nick Dimiduk commented on HBASE-8220:
-------------------------------------

Yes, let's get a patch for trunk here as well.

The general guideline is to do new development against trunk first and back-port on a case-by-case
basis. In that regard, this work is a little backwards.
                
> can we record the count opened HTable for HTablePool
> ----------------------------------------------------
>
>                 Key: HBASE-8220
>                 URL: https://issues.apache.org/jira/browse/HBASE-8220
>             Project: HBase
>          Issue Type: Improvement
>          Components: Client
>    Affects Versions: 0.94.3
>            Reporter: cuijianwei
>            Assignee: cuijianwei
>         Attachments: HBASE-8220-0.94.3.txt, HBASE-8220-0.94.3.txt, HBASE-8220-0.94.3.txt-v2,
HBASE-8220-0.94.3-v2.txt, HBASE-8220-0.94.3-v3.txt, HBASE-8220-0.94.3-v4.txt, HBASE-8220-0.94.3-v5.txt
>
>
> In HTablePool, we have a method getCurrentPoolSize(...) to get how many opened HTable
has been pooled. However, we don't know ConcurrentOpenedHTable which means the count of HTable
get from HTablePool.getTable(...) and don't return to HTablePool by PooledTable.close(). The
ConcurrentOpenedHTable may be meaningful because it indicates how many HTables should be opened
for the application which may help us set the appropriate MaxSize of HTablePool. Therefore,
we can and a ConcurrentOpenedHTable as a counter in HTablePool.

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