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  1. Ignite
  2. IGNITE-10945

Document Baseline auto-adjust feature

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    • Task
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • None
    • 2.8
    • documentation
    • Docs Required

    Description

      From IGNITE-8571:

      Now we have only one way to change BLAT - manually update it via console.sh or API.

      We need to add the possibility to change it automatically. Adjust to current topology.

      So, I propose 3 new parameters which would be responsible to tune this feature.
      1. Flag autoAdjustEnabled - true/false. Easy. Manual baseline control or auto adjusting baseline.

      2. autoAdjustTimeout - time which we would wait after the actual topology change. But it would be reset if new discovery event happened. (node join/exit).

      3. autoAdjustMaxTimeout - time which we would wait from the first dicovery event in the chain. If we achieved it than we would change BLAT right away (no matter were another node join/exit happened or not).

      We need to change API next way:
      1. org.apache.ignite.IgniteCluster

      Add
      isBaselineAutoAdjustEnabled()
      setBaselineAutoAdjustEnabled(boolean enabled);
      setBaselineAutoAdjustTimeout(long timeoutInMs);
      setBaselineAutoAdjustMaxTimeout(long timeoutInMs);

      2. org.apache.ignite.configuration.IgniteConfiguration

      Add
      IgniteConfiguration setBaselineAutoAdjustEnabled(boolean enabled);
      IgniteConfiguration setBaselineAutoAdjustTimeout(long timeoutInMs);
      IgniteConfiguration setBaselineAutoAdjustMaxTimeout(long timeoutInMs);

      Also, we need to ensure that all nodes would have the same parameters.
      And we should be able to survive coordinator left during parameters changes.

      -
      ForĀ IGNITE-8575:

      Proposed API format for control.sh:

      --baseline autoadjust disable
      --baseline autoadjust enable <timeout>

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              Artem Budnikov Artem Budnikov
              ibessonov Ivan Bessonov
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                Created:
                Updated:
                Resolved: