About the Oracle ACFS Mount Registry

The Oracle ACFS mount registry supports Oracle Grid Infrastructure cluster configurations, but does not support Oracle Restart configurations. File systems that are to be mounted persistently (across restarts) can be registered with the Oracle ACFS mount registry. In cluster configurations, registered Oracle ACFS file systems are automatically mounted by the mount registry, similar to a clusterwide mount table. However, in Oracle Restart configurations the automatic mounting of registered Oracle ACFS file systems is not supported. For more information, see "Oracle ACFS and Oracle Restart".

By default, an Oracle ACFS file system that is inserted into the Oracle ACFS mount registry is automatically mounted on all cluster members, including cluster members that are added after the registry addition. However, the Oracle ACFS mount registry also accommodates standalone and multi-node (subset of cluster nodes) file system registrations. The mount registry actions for each cluster member mount only registered file systems that have been designated for mounting on that member.

The Oracle ACFS mount registry is implemented using Oracle Clusterware resources, specifically the Oracle ACFS resource. The Oracle ACFS resource actions are designed to automatically mount a file system only one time for each Oracle Grid Infrastructure initialization to avoid potential conflicts with administrative actions to dismount a given file system.

For information about registering an Oracle ACFS file system using the acfsutil command, refer to "acfsutil registry" or the SRVCTL srvctl add filesystem command.

For more information about the implementation of the mount registry and Oracle ACFS resources, refer to "Oracle Clusterware Resources and Oracle ACFS Administration".