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From "takeshi.miao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4393) Implement a canary monitoring program
Date Wed, 09 Jan 2013 16:04:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13548606#comment-13548606
] 

takeshi.miao commented on HBASE-4393:
-------------------------------------

There are 4 differences compared with #HBASE-4393
1. this tool will take any one region from each region server to monitor, not every region
in whole HBase cluster
2. this tool was implemented with multi-threaded feature, so it will not be blocked if any
region server being hung
3. this tool is taking one or more region server FQDN as options, then will monitor the given
region servers
3.1 monitor all region servers if no option given
4. this tool can also take one or more regular expression patterns for region server FQDN
for user easily use

I use this tool on our internal HBase operation, so I think that other people may have the
identical requirements
                
> Implement a canary monitoring program
> -------------------------------------
>
>                 Key: HBASE-4393
>                 URL: https://issues.apache.org/jira/browse/HBASE-4393
>             Project: HBase
>          Issue Type: New Feature
>          Components: monitoring
>    Affects Versions: 0.92.0
>            Reporter: Todd Lipcon
>            Assignee: Matteo Bertozzi
>             Fix For: 0.94.0, 0.96.0
>
>         Attachments: Canary-v0.java, HBASE-4393-v0.patch, HBaseCanary.java
>
>
> This JIRA is to implement a standalone program that can be used to do "canary monitoring"
of a running HBase cluster. This program would gather a list of the regions in the cluster,
then iterate over them doing lightweight operations (eg short scans) to provide metrics about
latency as well as alert on availability issues.

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