feat: introduce adaptive_parallelism_strategy
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yezizp2012
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…parallelism adjustment
…mStrategy, apply in DDL and Scale Signed-off-by: Shanicky Chen <peng@risingwave-labs.com>
… Improve error handling Signed-off-by: Shanicky Chen <peng@risingwave-labs.com>
… alteration in `scale` tests
…, default is "Auto"
… logic; expand test suite
…`tests.system_param` module.
Signed-off-by: Shanicky Chen <peng@risingwave-labs.com>
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What's changed and what's your intention?
This PR adds a system parameter called
adaptive_parallelism_strategyto control the behavior of jobs when they are of the adaptive type, including options likeAuto/Full,Bounded(n), andRatio(r). These can be accessed in real-time to manage scheduling and rescheduling. Modifying this will send a local notification to inform the scale controller.Checklist
Documentation
Release note
This PR adds behavior for jobs with adaptive parallelism.
Full, the job will use all available parallelism;Bounded(n), the maximum parallelism is limited ton;Ratio(r), the actual available parallelism will be multiplied by r (rounded down);Keep in mind that all parallelism is still subject to the limits of max parallelism and resource groups.
Additionally, the command
alter system set adaptive_parallelism_strategycan be used to modify this parameter, and it will update jobs in batches in the background.