178 z/TPF and WebSphere Application Server in a Service Oriented Architecture
Marriott's approach to addressing this challenge is based on the design of its enterprise
service bus (ESB) which will provide the company with enterprise-wide caching and message
queuing. However, not all transactions that are processed by MARSHA need to achieve the
same 200 ms response time. Certain transactions that can tolerate a higher latency can act
as a service consumer without the same response time concerns. What is important is that a
governance model is established that utilizes SLAs, including message arrival rate
information, so that appropriate implementation decisions can be made.
8.6 Final words of advice
Beyond the TPF-specific challenges, there are ...