xiangyuf opened a new pull request, #23201:
URL: https://github.com/apache/flink/pull/23201
## What is the purpose of the change
Add min number of slots configuration to limit total number of slots
## Brief change log
- Introduce "slotmanager.number-of-slots.min" configuration option with
default value 0
- Introduce "slotmanager.min-total-resource.cpu" and
"slotmanager.min-total-resource.memory" configuration option with default value
derived from "slotmanager.number-of-slots.min"
- Make FineGrainedSlotManager respect the min number of cpu and memory.
After FineGrainedSlotManager is started, it will alway check the min resource
requirement when declaring resource to resourceAllocator.
- Make DeclarativeSlotManager's TaskExecutorManager respect the min number
of slots. When TaskExecutorManager is created, it will always fulfill the
min-slot-num requirement.
## Verifying this change
This change added tests and can be verified as follows:
- Added unit tests **SlotManagerConfigurationTest#testComputeMinTotalCpu**
and **SlotManagerConfigurationTest#testComputeMinTotalMemory** to test new
added options
- Added unit tests **FineGrainedSlotManagerTest#testMinTotalCpuResource**
and **FineGrainedSlotManagerTest#testMinTotalMemoryResource** to test the
function in FineGrainedSlotManager
- Added unit tests
**TaskExecutorManagerTest#testMinSlotRequirementAllocated** and
**TaskExecutorManagerTest#testMinSlotLimitClearPendingSlot** to test the
function in DeclarativeSlotManager
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / no) no
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / no) no
- The serializers: (yes / no / don't know) no
- The runtime per-record code paths (performance sensitive): (yes / no /
don't know) no
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / no / don't know)
yes, it will affect the behavior of SlotManager in JobManager
- The S3 file system connector: (yes / no / don't know) no
## Documentation
- Does this pull request introduce a new feature? (yes / no) no
- If yes, how is the feature documented? (not applicable / docs / JavaDocs
/ not documented)
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