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From "David S. Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5189) Add metrics to keep track of region-splits in RS
Date Mon, 06 Aug 2012 18:36:03 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13429327#comment-13429327

David S. Wang commented on HBASE-5189:

Matteo, my non-binding opintion is that I think moving to PersistentMetricsTimeVaryingRate
would be the right idea here in order to make this metric useful.
> Add metrics to keep track of region-splits in RS
> ------------------------------------------------
>                 Key: HBASE-5189
>                 URL: https://issues.apache.org/jira/browse/HBASE-5189
>             Project: HBase
>          Issue Type: Improvement
>          Components: metrics, regionserver
>    Affects Versions: 0.90.5, 0.92.0
>            Reporter: Mubarak Seyed
>            Assignee: Mubarak Seyed
>            Priority: Minor
>              Labels: noob
>             Fix For: 0.94.0
>         Attachments: HBASE-5189-persistent.patch, HBASE-5189.trunk.v1.patch, HBASE-5189.trunk.v2.patch
> For write-heavy workload with region-size 1 GB, region-split is considerably high. We
do normally grep the NN log (grep "mkdir*.split" NN.log | sort | uniq -c) to get the count.
> I would like to have a counter incremented each time region-split execution succeeds
and this counter exposed via the metrics stuff in HBase.
> - regionSplitSuccessCount
> - regionSplitFailureCount (will help us to correlate the timestamp range in RS logs across
all RS)

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