Batch jobHistory disk flushes ----------------------------- Key: MAPREDUCE-3512 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3512 Project: Hadoop Map/Reduce Issue Type: Improvement Components: mr-am, mrv2 Affects Versions: 0.23.0 Reporter: Siddharth Seth
The mr-am flushes each individual job history event to disk for AM recovery. The history even handler ends up with a significant backlog for tests like MAPREDUCE-3402. History events could be batched up based on num records / time / TaskFinishedEvents to reduce the number of DFS writes - with the potential drawback of having to rerun some tasks during AM recovery. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira