Page History

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• Expose two options to the user
  • slot.sharing-strategy and cluster.evenly-spread-out-slots
  • After discussing at mail list, we unify these 2 option into a option: taskmanager.load-balance.mode.
  • Related discussions at here:
    • https://lists.apache.org/thread/fsssvzodpkzw87nt2kx1slsdzkk3m30t
    • https://lists.apache.org/thread/h5zph52ovwxfhsj4rgm461jvlcowzody
    • https://lists.apache.org/thread/lkxvxp9mvb3wqf9114dz7osx5nr1vlpn
• Change the strategy of slot.request.max-interval
  • The old strategy is: when `current time > arrival time of the last slotRequest + slot.request.max-interval` and `the number of available slots cached exceeds or equals the pending slots`, the slots selection and allocation can be carried out.
  • The latest strategy is:
    • For DeclarativeSlotPool#increaseResourceRequirementsBy, When `current time > arrival time of the last slotRequest + slot.request.max-interval`, then the SlotPool declareResourceRequirement to DeclarativeSlotPool declareResourceRequirement to the RM.
    • For DeclarativeSlotPool#decreaseResourceRequirementsBy, When `current time > arrival time of the last slotRequest + slot.request.max-interval`, then the DeclarativeSlotPool declareResourceRequirement to the RM.
    • For DeclarativeSlotPoolBridge, When `the number of available slots cached exceeds or equals the pending slots`, the slots selection and allocation can be carried out.
  • This new strategy not only implements the functionality of the old strategy, but also reduces the number of rpcs from SlotPool to ResourceManager.

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