Veritas Cluster Server
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Veritas Cluster Server (also known as VCS) is a High-availability cluster software, for Unix, Linux and Microsoft Windows computer systems, created by Veritas Software (now part of Symantec). It provides application cluster capabilities to systems running Databases, file sharing on a network, electronic commerce websites or other applications.
High availability clusters (HAC) improve availability of applications by failing them over or switching them over in a group of systems as opposed to High Performance Clusters which improve performance of applications by allowing them to run on multiple systems simultaneously.
Most Veritas cluster server implementations, attempt to build availability into a cluster, eliminating single points of failure by making use of redundant components like multiple network cards, storage area networks in addition to the use of VCS.
Similar products include Linux-HA, Sun Cluster, Microsoft Cluster Server (MSCS) and IBM HACMP
VCS is a user-level clustering software; all of VCS processes are normal system processes on the systems it operates on, and have no special access to the Operating System or kernel functions in the host systems.
[edit] See also
[edit] External links
[edit] References
- Greg Pfister: In Search of Clusters, Prentice Hall, ISBN 0-13-899709-8
- Evan Marcus, Hal Stern: Blueprints for High Availability: Designing Resilient Distributed Systems, John Wiley & Sons, ISBN 0-471-35601-8
