[MAPREDUCE-1261] Enhance mumak to implement a 'stress-test' for the JobTracker

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: contrib/mumak
• Assignee: Unassigned
• Reporter: Arun Murthy
• Created: 03/Dec/09 06:39
• Updated: 29/Jul/14 20:58
• Resolved: 29/Jul/14 20:58

Description

I propose we enhance mumak to implement a proper 'stress-test' tool for the JobTracker. The idea is that we enhance mumak to have a mode where it can use the real JobTracker (and Scheduler of course) and mumak's SimulatedTaskTracker to run real workloads from production job-history traces. Clearly we will need to make necessary changes to allow the SimulatedTaskTrackers to run independently (a thread per SimulatedTT) in a distributed manner.

We can then simulate very large clusters and workloads using a handful of machines (say ~50 machines to simulate workload which originally ran on a 4000 node cluster), also we can use this to stress the JobTracker with synthetic workloads.

Thoughts?