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Enhancing HBase with Metrics2: Improved Performance and Consistency

In this presentation, we explore the transition from outdated HBase metrics to the modern Metrics2 framework. Covering key issues such as performance improvements, naming consistency, and better support for metric sinks, we outline the benefits of updating to Metrics2, including faster scans and gets, enhanced histogram data, and streamlined metric filtering. The talk also addresses the necessary compatibility with Hadoop versions 1 and 2. Join us to learn how upgrading HBase metrics can lead to significant enhancements in performance and usability.

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Enhancing HBase with Metrics2: Improved Performance and Consistency

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Presentation Transcript

  1. HBase and Metrics2 Headline Goes Here DO NOT USE PUBLICLY PRIOR TO 10/23/12 • Elliott Clark |Engineer • January 2013 Speaker Name or Subhead Goes Here

  2. HBase Metrics Circa 0.90 to 0.94 • Spread around lots of places • Using old deprecated Metrics • Using Lots of ConcurrentHashMaps • Some metrics stored two places • Inconsistent Naming

  3. Lets Fix It

  4. Lets Fix it • Replace everything with metrics2 • Rename everything • Make things faster • Remove un-needed metrics

  5. Problems • Reflection would be hard and slow • Have to support both Hadoop 1 and Hadoop 2 • Need to add functionality to MetricsRegistry

  6. Solution • Two implementations • One for Hadoop 1 -- hbase-hadoop1-compat • One for Hadoop 2 – hbase-hadoop2-compat • Layer connecting hbase-server to correct compat • Use ServiceLoader so there’s no compile dependency

  7. Jar Dependencies hbase-server hbase-hadoop-compat hbase-hadoop2-compat hbase-hadoop1-compat

  8. Yeah but why do I really care about this ?

  9. Performance • Performance improvements • 9% on scans. • ~5% on gets • < 1% on all calls.

  10. Naming • Metrics have changed names • All Camel Cased • Count used as suffix to denote a counter • Metrics have descriptions

  11. Better Sink Support • Can filter metrics at the source • Some sources can take per region metrics • Others only need small subset

  12. What else Does the HBase user see ? • More Histograms meaning more data • Metrics should be MUCH easier to find in JMX • Ability to Filter what metrics are reported where • OpenTSDB will need a patch to work

  13. Wrap Up • Trunk (soon to be 0.96) now on Metrics2 • Still needs more documentation

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