ABSTRACT
Today’s society is increasingly dependent on the networked software providing continuous services [1]. This kind of software systems is deployed in an open network environment, various elements of interaction and cooperation. Compared with traditional software system, the safety, availability and reliability confidence problem becomes more and more dicult to guarantee, especially to provide 7*24 continuous service characteristics, so that it is more and more emphasized in the operation of the dynamic adjustment of structure and function, to ensure that in response to a variety of changes with time still can continue to provide services [2].
