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From "Jonathan Lawlor (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5980) Scanner responses from RS should include metrics on rows/KVs filtered
Date Tue, 28 Apr 2015 19:39:07 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5980?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Lawlor updated HBASE-5980:
-----------------------------------
    Status: Patch Available  (was: Open)

> Scanner responses from RS should include metrics on rows/KVs filtered
> ---------------------------------------------------------------------
>
>                 Key: HBASE-5980
>                 URL: https://issues.apache.org/jira/browse/HBASE-5980
>             Project: HBase
>          Issue Type: Improvement
>          Components: Client, metrics, regionserver
>    Affects Versions: 0.95.2
>            Reporter: Todd Lipcon
>            Assignee: Jonathan Lawlor
>            Priority: Minor
>         Attachments: HBASE-5980-v1.patch, HBASE-5980-v2.patch
>
>
> Currently it's difficult to know, when issuing a filter, what percentage of rows were
skipped by that filter. We should expose some basic counters back to the client scanner object.
For example:
> - number of rows filtered by row key alone (filterRowKey())
> - number of times each filter response was returned by filterKeyValue() - corresponding
to Filter.ReturnCode
> What would be slickest is if this could actually return a tree of counters for cases
where FilterList or other combining filters are used. But a top-level is a good start.



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