v.20.1Backward Incompatible Changes
Enable use_minimalistic_part_header_in_zookeeper for ReplicatedMergeTree by Default
Enableuse_minimalistic_part_header_in_zookeepersetting forReplicatedMergeTreeby default. This will significantly reduce amount of data stored in ZooKeeper. This setting is supported since version 19.1 and we already use it in production in multiple services without any issues for more than half a year. Disable this setting if you have a chance to downgrade to versions older than 19.1. #6850 (alexey-milovidov)