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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9086) Add some options to improve count performance
Date Fri, 02 Aug 2013 03:59:50 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13727293#comment-13727293
] 

Lars Hofhansl commented on HBASE-9086:
--------------------------------------

Need to test this carefully (correctness and performance). FilterList is a bit dicey with
mutating filters (such as KeyOnlyFilter).
                
> Add some options to improve count performance
> ---------------------------------------------
>
>                 Key: HBASE-9086
>                 URL: https://issues.apache.org/jira/browse/HBASE-9086
>             Project: HBase
>          Issue Type: Wish
>          Components: shell
>    Affects Versions: 0.94.2
>            Reporter: Cheney Sun
>         Attachments: HBase-9086.patch, HBase-9086_v0.2.patch
>
>
> The current count command in HBase shell is quite slow if the row size is very big (100+kB
each). It would be helpful to provide some option to specify the column to count, which could
give user a chance to reduce the data volume to scan. 
> IMHO, only count the row key would be the ideal solution. Not sure how difficult to implement
it.

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