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https://issues.apache.org/jira/browse/HBASE-13199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14372114#comment-14372114
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Hudson commented on HBASE-13199:
--------------------------------
FAILURE: Integrated in HBase-TRUNK #6284 (See
[https://builds.apache.org/job/HBase-TRUNK/6284/])
HBASE-13199 ADDENDUM Some small improvements on canary tool (Shaohui Liu)
(busbey: rev f4eb7191be66ada04c94cd555acbfe34efc350c1)
* 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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