Xintong Song created FLINK-14106:
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Summary: Make SlotManager pluggable
Key: FLINK-14106
URL: https://issues.apache.org/jira/browse/FLINK-14106
Project: Flink
Issue Type: Improvement
Components: Runtime / Coordination
Affects Versions: 1.9.0
Reporter: Xintong Song
Fix For: 1.10.0
As we are enabling fine grained resource management in 1.10, we can have
various resource scheduling strategies. Such strategies generally should make
the following three decisions.
* When to launch new / release existing TMs? (How many TMs)
* What and how many resources should TMs be started with?
* How to allocate between slot requests and TM resources?
We may want to make above decisions differently in different scenarios
(active/reactive mode, perjob/session mode, etc.). Therefore, we propose to
make the scheduling strategies pluggable.
We propose to make the following changes:
* Make SlotManager an interface, and implements it differently for different
strategies strategies.
* Modify ResourceManager-SlotManager interfaces to cover all the three
decisions mentioned above in SlotManager. In particular, SlotManager needs to
allocate TM resources instead of slot resources from ResourceActions.
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