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Bochun Bai commented on MAPREDUCE-1379: --------------------------------------- Arun, this patch added mapreduce.tasktracker.total.tasks.maximum property in mapred-site.xml. This value set to map+reduce default. > Limit both numMapTasks and numReduceTasks > ----------------------------------------- > > Key: MAPREDUCE-1379 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-1379 > Project: Hadoop Map/Reduce > Issue Type: New Feature > Components: tasktracker > Affects Versions: 0.22.0 > Reporter: Bochun Bai > Priority: Trivial > Attachments: limit-both-numMapTasks-and-numReduceTasks.patch > > > In some environment, the number of concurrent running process is very > sensitive. > mapreduce.tasktracker.map.tasks.maximum > and > mapreduce.tasktracker.reduce.tasks.maximum > limit tasks running on each tasktracker separately. > This patch limits them together. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.