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Jim Brennan commented on YARN-1529: ----------------------------------- Thanks [~epayne]! > Add Localization overhead metrics to NM > --------------------------------------- > > Key: YARN-1529 > URL: https://issues.apache.org/jira/browse/YARN-1529 > Project: Hadoop YARN > Issue Type: Improvement > Components: nodemanager > Reporter: Gera Shegalov > Assignee: Jim Brennan > Priority: Major > Fix For: 3.2.2, 2.10.1, 3.4.0, 3.3.1, 3.1.5 > > Attachments: YARN-1529-branch-2.10.001.patch, YARN-1529.005.patch, > YARN-1529.006.patch, YARN-1529.v01.patch, YARN-1529.v02.patch, > YARN-1529.v03.patch, YARN-1529.v04.patch > > > Users are often unaware of localization cost that their jobs incur. To > measure effectiveness of localization caches it is necessary to expose the > overhead in the form of metrics. > We propose addition of the following metrics to NodeManagerMetrics. > When a container is about to launch, its set of LocalResources has to be > fetched from a central location, typically on HDFS, that results in a number > of download requests for the files missing in caches. > LocalizedFilesMissed: total files (requests) downloaded from DFS. Cache > misses. > LocalizedFilesCached: total localization requests that were served from local > caches. Cache hits. > LocalizedBytesMissed: total bytes downloaded from DFS due to cache misses. > LocalizedBytesCached: total bytes satisfied from local caches. > Localized(Files|Bytes)CachedRatio: percentage of localized (files|bytes) that > were served out of cache: ratio = 100 * caches / (caches + misses) > LocalizationDownloadNanos: total elapsed time in nanoseconds for a container > to go from ResourceRequestTransition to LocalizedTransition -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org