BACK-END SERVER CLUSTERS
DOI link for BACK-END SERVER CLUSTERS
BACK-END SERVER CLUSTERS book
A server cluster consists of multiple processor nodes that frequently act as a single logical system. Features vary from product to product, and can include high availability, load balancing, resource sharing, and parallel processing. There are two main categories of server clusters: primarily stateless specialist servers, such as firewalls and Web servers, and more general-purpose commercial servers that tend to be stateful, such as database and file servers. Stateless servers are discussed in Chapter 26. This taster concentrates on clustering software that is mainly aimed at general-purpose commercial servers. It commences with some background to server cluster technology, and discusses resilience features; the ability to share hardware and software resources; and parallel processing. Scientific high-performance clusters are not addressed.