Benefits and Limitations of Clustering
Topic Last Modified: 2005-05-20
In general, Exchange clustering provides high availability by allowing your mission-critical applications to keep running in the event of a failure. Although clustering adds additional complexity to your messaging environment, it provides a number of advantages over using stand-alone (non-clustered) servers.
The following is a general summary of clustering benefits and limitations.
- Clustering benefits
Reduced single points of failure through Exchange Virtual Server (EVS) failover functionality.
Ability to perform maintenance and upgrades with limited downtime.
Ability to easily scale up your cluster to a maximum of seven active EVSs.
- Reduced single points of failure through Exchange Virtual Server (EVS) failover functionality.
- Clustering limitations
Clustering does not provide protection from:
Shared storage failures.
Network service failures.
Site disasters (unless a geographically dispersed clustering solution has been implemented).
- Shared storage failures.
For information about the fault tolerant benefits of clustering, see "Implementing a Server Clustering Solution" in System-Level Fault Tolerant Measures.