Enterprise MOSS 2007 HA Server Farm Configuration

MOSS Hosting - 8 Server Farm

Server redundancy is implemented at each layer of a configuration to bring high availability in the overall system. For the WFE layer, this can be achieved by using at least two front-end load-balanced web servers. For database layer; two clustered database servers can be used.

An 8 server configuration adds one more index server, and 2 redundant search servers, giving a significant boost to overall performance.

Additional "tweaks" can be made to the responsibility of application roles (Excel Services, Search, etc…). By releasing this responsibility from the front end layer, application performance is improved in terms of response time and overall user experience.

For any High Availability server configuration, it should be noted that not all application server roles can be redundant. There are certain limiting factors that restrict you from adding redundancy to server roles. For instance, Indexing servers cannot be redundant. However, Fpweb.net addresses this native deficiency by using replication technology on the Index Servers to provide redundancy for this server role thus removing another single point of failure.