[YARN-7437] Rename PlacementSet and SchedulingPlacementSet

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0
• Assignee: Wangda Tan
• Reporter: Wangda Tan
• Created: 03/Nov/17 16:47
• Updated: 09/Nov/17 21:50
• Resolved: 09/Nov/17 21:39

Description

Currently, the SchedulingPlacementSet is very confusing. Here're its responsibilities:

1) Store ResourceRequests. (Or SchedulingRequest after YARN-6592).
2) Decide order of nodes to allocate when there're multiple node candidates.
3) Decide if we should reject node for given requests.
4) Store any states/cache can help make decision for #2/#3