https://community.cloudera.com/t5/Archives-of-Support-Questions/what-does-Average-percentage-of-local-files-to-RegionServer/m-p/132262#M27290 <P>I found the metric Regionserver.Server.percentFilesLocal on ambari which is showing 20%. What is the meaning of the metric? Any details would be appreciated.</P> Thu, 05 May 2016 09:52:08 GMT sunile_manjee 2016-05-05T09:52:08Z https://community.cloudera.com/t5/Archives-of-Support-Questions/what-does-Average-percentage-of-local-files-to-RegionServer/m-p/132262#M27290 <P>I found the metric Regionserver.Server.percentFilesLocal on ambari which is showing 20%. What is the meaning of the metric? Any details would be appreciated.</P> Thu, 05 May 2016 09:52:08 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/what-does-Average-percentage-of-local-files-to-RegionServer/m-p/132262#M27290 sunile_manjee 2016-05-05T09:52:08Z https://community.cloudera.com/t5/Archives-of-Support-Questions/what-does-Average-percentage-of-local-files-to-RegionServer/m-p/132263#M27291 <P>That's the ratio of HFiles associated with regions served by an RS having one replica stored on the local Data Node in HDFS. RS can access local files directly from a local disk if short-circuit is enabled. And If you, for example run a RS on a machine without DN, its locality will be zero. You can find more details <A href="http://hadoop-hbase.blogspot.jp/2013/07/hbase-and-data-locality.html">here</A>. And on HBase Web UI page you can find locality per table.</P> Thu, 05 May 2016 10:42:32 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/what-does-Average-percentage-of-local-files-to-RegionServer/m-p/132263#M27291 pminovic 2016-05-05T10:42:32Z