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@ -58,9 +58,9 @@ It's still unclear if this algorithm is good or optimal at all. It's unclear if
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To test and optimize SimpleMergeSelector, we apply the following methods:
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- insert/merge simulator: a model simulating parts insertion and merging;
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merge selecting algorithm is applied and the relevant metrics are calculated to allow to tune the algorithm;
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merge selecting algorithm is applied and the relevant metrics are calculated to allow to tune the algorithm;
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- insert/merge simulator on real `system.part_log` from production - it gives realistic information about inserted data parts:
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their sizes, at what time intervals they are inserted;
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their sizes, at what time intervals they are inserted;
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There is a research thesis dedicated to optimization of merge algorithm:
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https://presentations.clickhouse.tech/hse_2019/merge_algorithm.pptx
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