[ https://issues.apache.org/jira/browse/HADOOP-13065?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hitesh Shah updated HADOOP-13065: --------------------------------- Assignee: Mingliang Liu (was: Aaron Fabbri) > Add a new interface for retrieving FS and FC Statistics > ------------------------------------------------------- > > Key: HADOOP-13065 > URL: https://issues.apache.org/jira/browse/HADOOP-13065 > Project: Hadoop Common > Issue Type: New Feature > Components: fs > Reporter: Ram Venkatesh > Assignee: Mingliang Liu > Fix For: 2.8.0 > > Attachments: HADOOP-13065-007.patch, HADOOP-13065.008.patch, > HADOOP-13065.009.patch, HADOOP-13065.010.patch, HADOOP-13065.011.patch, > HADOOP-13065.012.patch, HADOOP-13065.013.patch, HDFS-10175.000.patch, > HDFS-10175.001.patch, HDFS-10175.002.patch, HDFS-10175.003.patch, > HDFS-10175.004.patch, HDFS-10175.005.patch, HDFS-10175.006.patch, > TestStatisticsOverhead.java > > > Currently FileSystem.Statistics exposes the following statistics: > BytesRead > BytesWritten > ReadOps > LargeReadOps > WriteOps > These are in-turn exposed as job counters by MapReduce and other frameworks. > There is logic within DfsClient to map operations to these counters that can > be confusing, for instance, mkdirs counts as a writeOp. > Proposed enhancement: > Add a statistic for each DfsClient operation including create, append, > createSymlink, delete, exists, mkdirs, rename and expose them as new > properties on the Statistics object. The operation-specific counters can be > used for analyzing the load imposed by a particular job on HDFS. > For example, we can use them to identify jobs that end up creating a large > number of files. > Once this information is available in the Statistics object, the app > frameworks like MapReduce can expose them as additional counters to be > aggregated and recorded as part of job summary. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org