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These settings are available in system.settings and are autogenerated from source.

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connect_timeout

Connection timeout if there are no replicas.

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connect_timeout_with_failover_ms

The timeout in milliseconds for connecting to a remote server for a Distributed table engine, if the ‘shard’ and ‘replica’ sections are used in the cluster definition. If unsuccessful, several attempts are made to connect to various replicas.

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connect_timeout_with_failover_secure_ms

Connection timeout for selecting first healthy replica (for secure connections).
Last modified on July 23, 2026