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Hadoop QA commented on YARN-1529: --------------------------------- {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12621292/YARN-1529.v03.patch against trunk revision 788ee35. {color:red}-1 patch{color}. The patch command could not apply the patch. Console output: https://builds.apache.org/job/PreCommit-YARN-Build/6260//console This message is automatically generated. > 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: Gera Shegalov > Attachments: YARN-1529.v01.patch, YARN-1529.v02.patch, > YARN-1529.v03.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 (v6.3.4#6332)