[FLINK-10429] Redesign Flink Scheduling, introducing dedicated Scheduler component

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Done
• Affects Version/s: 1.7.0
• Component/s: Runtime / Coordination
• Assignee: Unassigned
• Reporter: Stefan Richter
• Created: 26/Sep/18 10:01
• Updated: 25/Jan/21 05:43
• Resolved: 25/Jan/21 05:43

Description

This epic tracks the redesign of scheduling in Flink. Scheduling is currently a concern that is scattered across different components, mainly the ExecutionGraph/Execution and the SlotPool. Scheduling also happens only on the granularity of individual tasks, which make holistic scheduling strategies hard to implement. In this epic we aim to introduce a dedicated Scheduler component that can support use-case like auto-scaling, local-recovery, and resource optimized batch.

The design for this feature is developed here: https://docs.google.com/document/d/1q7NOqt05HIN-PlKEEPB36JiuU1Iu9fnxxVGJzylhsxU/edit?usp=sharing

Issue Links

• blocks: FLINK-10240 Pluggable scheduling strategy for batch jobs
• blocks: FLINK-11298 Scheduling job in the unit of concurrent groups
• is blocked by: FLINK-15626 Remove legacy scheduler
• relates to: FLINK-12369 Implement a region failover strategy based on new FailoverStrategy interfaces
• relates to: FLINK-12002 Adaptive Parallelism of Job Vertex Execution
• supercedes: FLINK-10713 RestartIndividualStrategy does not restore state
• supercedes: FLINK-2250 Backtracking of intermediate results