[MAPREDUCE-1723] Capacity Scheduler should allow configuration of Map & Reduce task slots independently per queue

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.20.1
• Component/s: capacity-sched

Environment

all

• Assignee: Unassigned
• Reporter: Subramaniam Krishnan
• Created: 22/Apr/10 12:05
• Updated: 30/Jul/14 18:15
• Resolved: 30/Jul/14 18:14

Description

The Capacity Scheduler allows configuration of percentage of task slots per queue. We have a scenario in which our biggest queue (50% quota) has Jobs with mainly Map tasks & we need to enforce strict capacity limits per queue due to SLA requirements. So other smaller queues which require Reduce tasks gets starved even though the Reduce slots are idle. The Grid can be more efficiently utilized if Capacity Scheduler allows configuration of Map & Reduce task slots capacity independently per queue.