take a look at job preemption, new feature in YARN. @Ram D you can also raise and lower the priority of each job. Command to interact with Map Reduce Jobs. Usage: hadoop job [GENERIC_OPTIONS] [-submit <job-file>] | [-status <job-id>] | [-counter <job-id> <group-name> <counter-name>] | [-kill <job-id>] | [-events <job-id> <from-event-#> <#-of-events>] | [-history [all] <jobOutputDir>] | [-list [all]] | [-kill-task <task-id>] | [-fail-task <task-id>] | [-set-priority <job-id> <priority>] COMMAND_OPTION Description -submit job-file Submits the job. -status job-id Prints the map and reduce completion percentage and all job counters. -counter job-id group-name counter-name Prints the counter value. -kill job-id Kills the job. -events job-id from-event-# #-of-events Prints the events' details received by jobtracker for the given range. -history [all]jobOutputDir Prints job details, failed and killed tip details. More details about the job such as successful tasks and task attempts made for each task can be viewed by specifying the [all] option. -list [all] Displays jobs which are yet to complete. -list all displays all jobs. -kill-task task-id Kills the task. Killed tasks are NOT counted against failed attempts. -fail-task task-id Fails the task. Failed tasks are counted against failed attempts. -set-priority job-id priority Changes the priority of the job. Allowed priority values are VERY_HIGH, HIGH, NORMAL, LOW, VERY_LOW
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