Improve parallelization in Redis Sink#866
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: pyalex, woop The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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* replace group with batch * featureReference as key * configurable flush frequncy in redis sink * pull config to RedisSink
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* replace group with batch * featureReference as key * configurable flush frequncy in redis sink * pull config to RedisSink
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What this PR does / why we need it:
In redis sink we pack rows into batches before actually flush them to redis. Current implementation use GroupBy null (all rows into one group) which cause a lot of shuffling. It could lead to significant throughput degradation. This PR replaces GroupBy with GroupIntoBatches with FeatureReference used as key. This should improve parallelization of Redis Sink
Which issue(s) this PR fixes:
Fixes #
Does this PR introduce a user-facing change?: