[YARN-600] Hook up cgroups CPU settings to the number of virtual cores allocated

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.3-alpha
• Fix Version/s: 2.1.0-beta
• Component/s: resourcemanager, scheduler
• Target Version/s: 2.1.0-beta
• Hadoop Flags: Reviewed
• Assignee: Sandy Ryza
• Reporter: Sandy Ryza
• Created: 23/Apr/13 00:06
• Updated: 27/Aug/13 22:15
• Resolved: 12/Jun/13 19:02

Description

YARN-3 introduced CPU isolation and monitoring through cgroups. YARN-2 and introduced CPU scheduling in the capacity scheduler, and YARN-326 will introduce it in the fair scheduler. The number of virtual cores allocated to a container should be used to weight the number of cgroups CPU shares given to it.