The Veritas Cluster File System, (or VxCFS), is a cache coherent

Cache coherency

In computing, cache coherence refers to the consistency of data stored in local caches of a shared resource.When clients in a system maintain caches of a common memory resource, problems may arise with inconsistent data. This is particularly true of CPUs in a multiprocessing system...

 POSIX compliant shared file system built based upon VERITAS File System

VERITAS File System

The VERITAS File System, , is an extent-based file system. It was originally developed by VERITAS Software. Through an OEM agreement, VxFS is used as the primary filesystem of the HP-UX operating system...

. It is distributed with a built-in Cluster Volume Manager (VxCVM) and components of other VERITAS Storage Foundation products - particularly VERITAS Cluster Server

Veritas Cluster Server

Veritas Cluster Server is a High-availability cluster software, for Unix, Linux and Microsoft Windows computer systems, created by Veritas Software...

, VERITAS File System, and VERITAS Volume Manager

Veritas Volume Manager

The Veritas Volume Manager, VVM or VxVM is a proprietary logical volume manager from Veritas . It is available for Windows, AIX, Solaris, Linux, and HP-UX. A modified version is bundled with HP-UX as its built-in volume manager...

. It uses the underlying mechanisms of VERITAS Cluster Server to manage membership and changes in cluster state.

The shared file system is available on most major commercial UNIX distributions, specifically AIX, Solaris

Solaris Operating System

Solaris is a Unix operating system originally developed by Sun Microsystems. It superseded their earlier SunOS in 1993. Oracle Solaris, as it is now known, has been owned by Oracle Corporation since Oracle's acquisition of Sun in January 2010....

, Linux

Linux

Linux is a Unix-like computer operating system assembled under the model of free and open source software development and distribution. The defining component of any Linux system is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds...

, and HP-UX

HP-UX

HP-UX is Hewlett-Packard's proprietary implementation of the Unix operating system, based on UNIX System V and first released in 1984...

. The current version of the product is version 5.0.

Mode of clustering

Because of the need to maintain cluster awareness to prevent any data corruption or discrepancies in cache, the clusters are tightly coupled and communicate over Ethernet

Ethernet

Ethernet is a family of computer networking technologies for local area networks commercially introduced in 1980. Standardized in IEEE 802.3, Ethernet has largely replaced competing wired LAN technologies....

.

See also

• Veritas File System
  VERITAS File System
  The VERITAS File System, , is an extent-based file system. It was originally developed by VERITAS Software. Through an OEM agreement, VxFS is used as the primary filesystem of the HP-UX operating system...
  
  
• Veritas Volume Manager
  Veritas Volume Manager
  The Veritas Volume Manager, VVM or VxVM is a proprietary logical volume manager from Veritas . It is available for Windows, AIX, Solaris, Linux, and HP-UX. A modified version is bundled with HP-UX as its built-in volume manager...
  
  
• Veritas Cluster Server
  Veritas Cluster Server
  Veritas Cluster Server is a High-availability cluster software, for Unix, Linux and Microsoft Windows computer systems, created by Veritas Software...
  
  
• Symantec Operations Readiness Tools (SORT)

External links

• Veritas Cluster File System documentation
• Symantec Operations Readiness Tools (SORT)