v.24.9Experimental Feature

New Algorithm for Marks Distribution in Parallel Replicas Using Consistent Hashing

Official CH changelog text
New algorithm to determine the unit of marks distribution between parallel replicas by a consistent hash. Different numbers of marks chosen for different read patterns to improve performance. #68424 (Nikita Taranov).
Introduces a new algorithm that uses consistent hashing to determine the distribution unit of marks between parallel replicas in ClickHouse.

Why it matters

This feature optimizes the selection of marks for different read patterns by choosing varying numbers of marks, which improves query performance when using parallel replicas.

How to use it

Users benefit from improved performance automatically when querying with parallel replicas, as the new consistent hash-based marks distribution algorithm is integrated into the system; no explicit configuration is needed to enable it.

Related resources

PreviousNext