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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13199) Some small improvements on canary tool
Date Sat, 23 May 2015 01:00:19 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14557068#comment-14557068
] 

Hudson commented on HBASE-13199:
--------------------------------

FAILURE: Integrated in HBase-0.98-on-Hadoop-1.1 #950 (See [https://builds.apache.org/job/HBase-0.98-on-Hadoop-1.1/950/])
HBASE-13712 Backport HBASE-13199 to branch-1 (apurtell: rev e8d8ca74e553479efdd75f81f705c88a7ec66947)
* hbase-server/src/main/java/org/apache/hadoop/hbase/tool/Canary.java


> Some small improvements on canary tool
> --------------------------------------
>
>                 Key: HBASE-13199
>                 URL: https://issues.apache.org/jira/browse/HBASE-13199
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: Liu Shaohui
>            Assignee: Liu Shaohui
>             Fix For: 2.0.0
>
>         Attachments: HBASE-13199-addendum-v2.diff, HBASE-13199-addendum.diff, HBASE-13199-v1.diff,
HBASE-13199-v2.diff, HBASE-13199-v3.diff, HBASE-13199-v4.diff
>
>
> Improvements
> - Make the sniff of region and regionserver parallel to support large cluster with 10000+
region and 500+ regionservers using thread pool.
> - Set cacheblock to false in get and scan to avoid influence to block cache.
> - Add FirstKeyOnlyFilter to get and scan to avoid read and translate too many data from
HBase. There may be many column under a column family in a flat-wide table.
>  - Select the region randomly when sniffing a regionserver.
>  - Make the sink class of canary configurable
> [~stack]
> Suggestions are welcomed. Thanks~
> Another question is that why to check each column family with separate requests when
sniffing a region? Can we just check a  column family of a region?



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