ClickHouse/tests/integration/test_distributed_load_balancing/configs/remote_servers.xml

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<yandex>
<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 -->
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<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>
</yandex>