v.21.11Improvements

Keeper in ClickHouse Server Now Starts Asynchronously with Node Connection

Official CH changelog text
Now Keeper (as part of clickhouse-server) will start asynchronously if it can connect to some other node. #30170 (alesapin).
ClickHouse's embedded Keeper service in clickhouse-server now supports asynchronous startup when connecting to another node.

Why it matters

This feature allows Keeper to start asynchronously if it detects that it can connect to an existing node, improving startup flexibility and reducing downtime in distributed environments.

How to use it

No explicit user action is needed; Keeper will automatically start asynchronously during clickhouse-server launch if it can connect to another node in the cluster.

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