[YARN-6418] Reduce Resource object creation and overhead in Capacity scheduler inner loop

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.7.3, 3.0.0-alpha2
• Component/s: capacityscheduler, resourcemanager
• Assignee: Roni Burd
• Reporter: Roni Burd
• Created: 30/Mar/17 23:44
• Updated: 02/May/17 23:23
• Resolved: 04/Apr/17 22:26

Description

Resource object is used multiple due to ResourceCalculator creates new instances on every method call. This gets called several times on each node HB. Resource is a very expensive object that relies on Protobufs

The change is to remove the need to use protobuf on the Resource object and avoid creating many objects in the Resource Calculator all the time