The SAN File System is designed as a highly available file system for SAN-
attached storage that provides file sharing and centralized storage management
for UNIX, Windows, and Linux servers. The SAN File System is intended to
combine the benefits of file sharing across servers provided by Network
Attached Storage (NAS) with the benefits from high performance data access
provided by Storage Area Networks (SAN).

The SAN File System is designed to support high performance data sharing for
heterogeneous servers accessing SAN-attached storage. It has a common file
system for UNIX, Windows, and Linux servers, with a single global namespace
providing data sharing across servers. The SAN File System is designed to
support the local file system interfaces on UNIX, Windows, and Linux servers,
and to be used typically without requiring any changes to your applications or
databases that use a file system to store data. The SAN File System is designed
as a highly scalable solution supporting both very large files and very large
numbers of files without the limitations normally associated with Network File
System (NFS) or Common Internet File System (CIFS) implementations.

The SAN File System is designed to help lower the cost of storage management
and enhance productivity by providing centralized storage and data management
for supported servers using the SAN File System. It provides policy-based
storage management through the use of customer-defined rules that specify
what storage is used when a file is created. With SAN File System V3.1, you
can define rules that specify when a file should be moved between different
storage pools and also can specify when a file should be deleted. Storage can
be virtualized into storage pools organized by service class, and files can
be automatically placed on the appropriate storage resource, thereby, helping
reduce administrative overhead.

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