ClickHouse/docs/en/system_tables/system.clusters.md
2018-03-26 17:00:55 +03:00

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# system.clusters
Contains information about clusters available in the config file and the servers in them.
Columns:
```text
cluster String Cluster name.
shard_num UInt32 Number of a shard in the cluster, starting from 1.
shard_weight UInt32 Relative weight of a shard when writing data.
replica_num UInt32 Number of a replica in the shard, starting from 1.
host_name String Host name as specified in the config.
host_address String Host's IP address obtained from DNS.
port UInt16 The port used to access the server.
user String The username to use for connecting to the server.
```