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

Clustering helps to protect an application against a disaster. The aim of clustering is to provide for the high availability of the system.

Application clustering often 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.

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 setup, an application runs only on one active node, with the other passive nodes used only if the application fails on the active node.

In an active-active cluster...