Staging Adjust Service Pool to Assure Availability in SOA Title

One of the most important issues for SOA is assure availability. The loose coupling of SOA brings challenges to assure availability. A widely adopted redundancy-based availability solution to dependable SOA is to pool multiple services. Existing research achievements mostly focus on service pool model and service selected algorithms, the calculate model of service pool size waste the redundancy cost. Aimed at this problem, this paper proposed availability mutant stage partition model, then multistage dynamic adjustment the size of service pool be used to optimization costs and satisfy availability requirement. At last, the experimental results show that proposed multistage dynamic planning can assure availability and decrease redundancy costs.