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Posted to dev@hbase.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2014/09/02 06:51:21 UTC

[jira] [Created] (HBASE-11876) RegionScanner.nextRaw(...) should update metrics

Lars Hofhansl created HBASE-11876:
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             Summary: RegionScanner.nextRaw(...) should update metrics
                 Key: HBASE-11876
                 URL: https://issues.apache.org/jira/browse/HBASE-11876
             Project: HBase
          Issue Type: Bug
    Affects Versions: 0.98.6
            Reporter: Lars Hofhansl


I added the RegionScanner.nextRaw(...) to allow "smart" client to avoid some of the default work that HBase is doing, such as {start|stop}RegionOperation and synchronized(scanner) for each row.

Metrics should follow the same approach. Collecting them per row is expensive and a caller should have the option to collect those later or to avoid collecting them completely.

We can also save some cycles in RSRcpServices.scan(...) if we updated the metric only once/batch instead of each row.




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