The final article of the Four Part series explains what companies should aim for today. Service Agility. Virtualisation is a key step on the path to agility but it is possible to configure yourself into a virtual point of failure.
The following diagram takes the same multi-tiered application illustrated in the Parts 1- 3 but deployed in a model that delivers Service Agility.
The following diagram takes the same multi-tiered application illustrated in the Parts 1- 3 but deployed in a model that delivers Service Agility.
True Service Agility exists with the elimination of static links between the elements of a service.
Think DNS! DNS provides the ability to bind a meaningful name to a less than meaningful IP Address. It also brought us the ability to change the IP Address binding while maintaining the meaningful name. A very basic for of agility but very slow and reliant on human intervention. ADC's deliver agility in real time on a per-user or per transaction bases. A good ADC can even react to server responsiveness.
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