[YARN-4026] FiCaSchedulerApp: ContainerAllocator should be able to choose how to order pending resource requests

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Target Version/s: 2.8.0
• Hadoop Flags: Reviewed
• Assignee: Wangda Tan
• Reporter: Wangda Tan
• Created: 07/Aug/15 05:34
• Updated: 30/Aug/16 01:17
• Resolved: 12/Aug/15 22:10

Description

After YARN-3983, we have an extensible ContainerAllocator which can be used by FiCaSchedulerApp to decide how to allocate resources.

While working on YARN-1651 (allocate resource to increase container), I found one thing in existing logic not flexible enough:

• ContainerAllocator decides what to allocate for a given node and priority: To support different kinds of resource allocation, for example, priority as weight / skip priority or not, etc. It's better to let ContainerAllocator to choose how to order pending resource requests.