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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8218) Pass HConnection and ExecutorService as parameters to methods of AggregationClient
Date Sat, 11 May 2013 13:21:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8218?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13655264#comment-13655264
] 

Ted Yu commented on HBASE-8218:
-------------------------------

The intention of this JIRA is to allow client reusing HTable instance across calls to max(),
min(), etc.
Would patch v4 achieve this ?
                
> Pass HConnection and ExecutorService as parameters to methods of AggregationClient
> ----------------------------------------------------------------------------------
>
>                 Key: HBASE-8218
>                 URL: https://issues.apache.org/jira/browse/HBASE-8218
>             Project: HBase
>          Issue Type: Improvement
>          Components: Client, Coprocessors
>    Affects Versions: 0.94.3
>            Reporter: cuijianwei
>            Assignee: cuijianwei
>             Fix For: 0.98.0
>
>         Attachments: 8218-trunk-v2-rerun.txt, 8218-trunk-v2.txt, 8218-trunk-v3-rerun.txt,
8218-trunk-v3.txt, HBASE-8218-0.94.3-v1.txt, HBASE-8218-0.94.3-v2.txt, HBASE-8218-0.94.3-v3.txt,
HBASE-8218-trunk-v1.txt, HBase-8218_Trunk_V4.patch
>
>
> In AggregationClient, methods such as max(...), min(...) pass 'tableName' as a parameter,
then a HTable will be created in the method, before the method return, the created HTable
will be closed.
> The process above may be heavy because each call must create and close a HTable. The
situation becomes worse when there is only one thread access HBase using AggregationClient.
The underly HConnection of created HTable will also be created and then closed each time when
we invoke these method because no other HTables using the HConnection. This operation is heavy.
Therefore, can we add another group of methods which pass HTable or HTablePool as a parameter
to methods defined in AggregationClient? 

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