How to know this database is clustered or not

How to know this database is clustered or not? Oracle 9, Oracle 10
Thank you

S.

Or check the Oracle doc,
How a database is mounted with Real Application Clusters
http://download.Oracle.com/docs/CD/B19306_01/server.102/b14220/startup.htm#sthref1866

If Oracle allows multiple instances to mount the same database at the same time, the database administrator can use the setting of CLUSTER_DATABASE initialization to provision the database for multiple instances. The default value of the parameter CLUSTER_DATABASE is false. The Oracle versions that do not support the Real Application Clusters only allow CLUSTER_DATABASE have the value false.

If CLUSTER_DATABASE is set to false for the first instance that goes up a database, then only this instance can mount the database. If CLUSTER_DATABASE is set to true at first, then others can mount the database if their CLUSTER_DATABASE settings are set to true. The number of bodies able to mount the database is subject to a predetermined maximum, you can specify when creating the database.

Tags: Database

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