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https://issues.apache.org/jira/browse/HBASE-5980?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-5980:
-------------------------
Resolution: Fixed
Fix Version/s: 1.2.0
2.0.0
Release Note:
Adds scan metrics to the result. In the shell, set the ALL_METRICS attribute to
true on your scan to see dump of metrics after results (see the scan help for
examples).
If you would prefer to see only a subset of the metrics, the METRICS array can
be defined to include the names of only the metrics you care about.
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Pushed to branch-1 and master.
Nice facility that gives insight on what is going on server-side.
It is off by default so should have no impact on scan perf.
Thanks [~jonathan.lawlor]
> 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, Operability, regionserver
> Affects Versions: 0.95.2
> Reporter: Todd Lipcon
> Assignee: Jonathan Lawlor
> Priority: Minor
> Fix For: 2.0.0, 1.2.0
>
> Attachments: 5980v5.master.txt, 5980v5.txt, 5980v5.txt, 5980v5.txt,
> 5980v5.txt, HBASE-5980-branch-1.patch, HBASE-5980-v1.patch,
> HBASE-5980-v2.patch, HBASE-5980-v2.patch, HBASE-5980-v3.patch,
> HBASE-5980-v4.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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