[AMBARI-19035] LLAP startup: Ambari should not use slider anti-affinity when it's avoidable

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.4.1
• Fix Version/s: 2.5.0
• Component/s: ambari-server
• Assignee: Swapan Shridhar
• Reporter: Swapan Shridhar
• Created: 30/Nov/16 19:23
• Updated: 27/Jan/17 20:15
• Resolved: 27/Jan/17 20:15

Description

• YARN does not support anti-affinity, and therefore Slider implements AA by the means of exclusion lists - it starts containers one by one and excludes the nodes it gets; that adds ~2sec./machine of overhead (on openstack).
• When the LLAP container memory size configuration is more than half of YARN node memory, or the same for number of cores, AA is implicit and should be avoided.

Issue Links

• is related to: AMBARI-18901 LLAP integration enhancements
• links to: Reviewboard Link