Todd Lipcon created HBASE-5980:
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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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