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From "Mikhail Bautin (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5292) getsize per-CF metric incorrectly counts compaction related reads as well
Date Fri, 09 Mar 2012 21:28:58 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mikhail Bautin updated HBASE-5292:
----------------------------------

    Attachment: jira-HBASE-5292-Prevent-counting-getSize-on-compacti-2012-03-09_13_26_52.patch

Rebased patch for Hadoop QA testing
                
> getsize per-CF metric incorrectly counts compaction related reads as well 
> --------------------------------------------------------------------------
>
>                 Key: HBASE-5292
>                 URL: https://issues.apache.org/jira/browse/HBASE-5292
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.89.20100924
>            Reporter: Kannan Muthukkaruppan
>         Attachments: 0001-jira-HBASE-5292-Prevent-counting-getSize-on-compacti.patch,
D1527.1.patch, D1527.2.patch, D1527.3.patch, D1527.4.patch, D1617.1.patch, jira-HBASE-5292-Prevent-counting-getSize-on-compacti-2012-03-09_13_26_52.patch
>
>
> The per-CF "getsize" metric's intent was to track bytes returned (to HBase clients) per-CF.
[Note: We already have metrics to track # of HFileBlock's read for compaction vs. non-compaction
cases -- e.g., compactionblockreadcnt vs. fsblockreadcnt.]
> Currently, the "getsize" metric gets updated for both client initiated Get/Scan operations
as well for compaction related reads. The metric is updated in StoreScanner.java:next() when
the Scan query matcher returns an INCLUDE* code via a:
>  HRegion.incrNumericMetric(this.metricNameGetsize, copyKv.getLength());
> We should not do the above in case of compactions.

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