<clickhouse> <remote_servers> <replicas_cluster> <shard> <replica> <host>n1</host> <port>9000</port> </replica> <replica> <host>n2</host> <port>9000</port> </replica> <replica> <host>n3</host> <port>9000</port> </replica> </shard> </replicas_cluster> <replicas_priority_cluster> <shard> <replica> <host>n1</host> <port>9000</port> <priority>0</priority> </replica> <replica> <host>n2</host> <port>9000</port> <!-- will not be quieried, if n1 and n3 has errors_count == 0 --> <!-- <priority>1</priority> --> </replica> <replica> <host>n3</host> <port>9000</port> <priority>0</priority> </replica> </shard> </replicas_priority_cluster> <replicas_priority_negative_cluster> <shard> <replica> <host>n1</host> <port>9000</port> <priority>-1</priority> </replica> <replica> <host>n2</host> <port>9000</port> <!-- will not be quieried, if n1 and n3 has errors_count == 0 --> <priority>0</priority> </replica> <replica> <host>n3</host> <port>9000</port> <priority>-1</priority> </replica> </shard> </replicas_priority_negative_cluster> <!-- For JOIN with system.clusters --> <shards_cluster> <node> <host>n1</host> <port>9000</port> </node> <node> <host>n2</host> <port>9000</port> </node> <node> <host>n3</host> <port>9000</port> </node> </shards_cluster> </remote_servers> </clickhouse>