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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5980) Scanner responses from RS should include metrics on rows/KVs filtered
Date Wed, 09 May 2012 22:53:49 GMT
Todd Lipcon created HBASE-5980:
----------------------------------

             Summary: 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: 0.96.0
            Reporter: Todd Lipcon
            Priority: Minor


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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