关键词：缓存；重显；信息流；产品平台
摘 要：InfoSphere Streams is a powerful middleware product that provides a platform fordevelopment of streaming applications and their execution in a fast and distributed manner.In a stream processing system, there is often a need to externalize the application-relatedstate information and share it with other distributed application components. It is possible todo distributed data sharing within the context of an InfoSphere Streams application. This isachieved through the use of the Distributed Process Store (dps) toolkit that provides a key-value store abstraction. The shared state can be stored in memcached or Redis — two popularopen source distributed state management systems.