[HIVE-24913] LlapTaskScheduler Improvements

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Panagiotis Garefalakis
• Created: 19/Mar/21 17:25
• Updated: 12/Apr/21 09:26

Issue Links

• is related to: HIVE-25001 Improvement for some debug-logging guards

Sub-Tasks

• Improve llap task scheduling for better cache hit rate: Closed
• LLAP: Provide an opportunity for preempted tasks to get better locality in next iteration: Closed
• Improve LLAP scheduling by only traversing hosts with capacity: Closed
• Optimize LlapTaskSchedulerService::preemptTasksFromMap: Closed
• LlapDaemon preemption should not be triggered for same Vertex tasks: Closed
• Optimise locking in LlapTaskSchedulerService: Closed
• LLAP: ensure tasks with locality have a chance to adjust delay: Closed
• LLAP Scheduler task exits with fatal error if the executor node is down: Resolved