This topic applies to AIX and Solaris.

Cluster Volume Manager (CVM) introduced the Flexible Storage Sharing (FSS) feature, which enables network sharing of local storage, cluster wide. The local storage can be in the form of Direct Attached Storage (DAS) or internal disk drives. Network shared storage is enabled by using a network interconnect between the nodes of a cluster.

FSS allows network shared storage to co-exist with physically shared storage, and logical volumes can be created using both types of storage creating a common storage namespace. Logical volumes using network shared storage provide data redundancy, high availability, and disaster recovery capabilities, without requiring physically shared storage, transparently to file systems and applications.

FSS use cases include support for current SFCFSHA and SF Oracle RAC use cases, off-host processing, DAS SSD benefits leveraged with existing SFHA Solutions features, FSS with File System level caching, and campus cluster configuration.

SF Oracle RAC certification for the FSS feature is currently in progress.

For more information about FSS, see the Administrator's Guide.