rework tabletbalancer interface to avoid unnecessary sort #443
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demmer
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There's actually no need in the tabletgateway to ever sort the full list of potential tablet candidates, because each query attempt only goes to a single tablet, and then if that fails, the withRetry loop records which tablet failed and then re-enters the loop to try again. Therefore, refactor the balancer to replace ShuffleTablets with a simple Pick interface that just returns the best tablet to route to.
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venkatraju
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Jul 8, 2024
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Description
Rework the tabletbalancer interface to avoid an unnecessary sort.
There's actually no need in the tabletgateway to ever sort the full list of potential tablet candidates, because each query attempt only goes to a single tablet, and then if that fails, the withRetry loop records which tablet failed and then re-enters the loop to try again.
Therefore, refactor the balancer to replace ShuffleTablets with a simple Pick interface that just returns the best tablet to route to.
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