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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13996) Add write sniffing in canary
Date Sat, 22 Aug 2015 19:14:45 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14708135#comment-14708135
] 

Hudson commented on HBASE-13996:
--------------------------------

FAILURE: Integrated in HBase-1.3 #127 (See [https://builds.apache.org/job/HBase-1.3/127/])
HBASE-13996 Add write sniffing in canary (Liu Shaohui) (apurtell: rev 234a4632a44dd5d8c70209a2dee70f71147a4a24)
* src/main/asciidoc/_chapters/ops_mgt.adoc
* hbase-common/src/main/java/org/apache/hadoop/hbase/HConstants.java
* hbase-server/src/main/jamon/org/apache/hadoop/hbase/tmpl/master/MasterStatusTmpl.jamon
* hbase-server/src/main/java/org/apache/hadoop/hbase/tool/Canary.java


> Add write sniffing in canary
> ----------------------------
>
>                 Key: HBASE-13996
>                 URL: https://issues.apache.org/jira/browse/HBASE-13996
>             Project: HBase
>          Issue Type: Improvement
>          Components: canary
>    Affects Versions: 0.98.13, 1.1.0.1
>            Reporter: Liu Shaohui
>            Assignee: Liu Shaohui
>             Fix For: 2.0.0, 0.98.14, 1.2.0, 1.3.0
>
>         Attachments: HBASE-13996-0.98.patch, HBASE-13996-branch-1.patch, HBASE-13996-v001.diff,
HBASE-13996-v002.diff, HBASE-13996-v003.diff, HBASE-13996-v004.diff
>
>
> Currently the canary tool only sniff the read operations, it's hard to finding the problem
in write path. 
> To support the write sniffing, we create a system table named '_canary_'  in the canary
tool. And the tool will make sure that the region number is large than the number of the regionserver
and the regions will be distributed onto all regionservers.
> Periodically, the tool will put data to these regions to calculate the write availability
of HBase and send alerts if needed.



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