System Resiliency
System resilience is the ability of a system to withstand a disaster and recover from it within an acceptable timeframe. This section presents a detailed discussion of application and telecommunications resiliency.
Application Resiliency – Clustering
Application clustering refers to a method of managing many servers through software. Clustered servers can help to create fault-tolerant systems and provide quicker responses and more capable data management for large networks. The aim of clustering is to provide for the high availability of the system. Clustering helps to protect an application against a disaster. In a clustered environment, multiple servers work together as one system. If one server fails due to a disaster, the other servers take over, keeping the application running.
An application that is clustered is protected against a single point of failure.
Application clusters can be either active-passive or active-active. In an active-passive...