Chapter 10. Architecting High Availability for Business Services

Availability of business services for enterprise SOA implementations at any organization is either mission-critical or business-critical. The availability of business services for an organization can directly impact the revenue or at least the brand value. Architects must understand and define the high availability requirements for an application platform in collaboration with business. The high availability is measured by the business services uptime by the different levels of 9s such as 99.0 percent, 99.9 percent, 99.99 percent, or 99.999 percent and often referenced as availability uptime Service Level Agreements (SLAs), either with business units or external customers. The high availability for an application platform providing business services has two dimensions to it; first systems architecture and second release and change management processes. In this chapter, our focus is to learn the high availability system's...