Communication delay and globally task arrangement should be well considered during distributed software design. Though the software design is a kind of creative work and there are reworks almost all the cases, as a result, the duration and even the task sequence is undetermined. Micro-estimation on demand, which we proposed in the former paper, refines the estimation of effort and duration for the tasks in the next short period. This paper is intended to present our solution to reschedule the design tasks among distributed software design teams, which includes multiple component status transition graph (MCSTG), micro-estimation and PERT technique. The schedule risk in such environment will be analyzed and the solution will focus on how to improve the time-to-market. With the solution presented, the designers may fasten their collaboration in global software design.

This paper presents a novel model to support security in dynamic cooperation of cross-enterprise services. With the extended WSDL description and through the replication technique, the service replica can be dynamically deployed and executed on the optimum cross-enterprise server, which is selected from the registered servers in the enhanced UDDI center according to the server evaluation function. In order to ensure the safety and dynamically sharing of the cross-enterprise resources among the Web services, a security mechanism of trusted right delegation is introduced

Rescheduling design tasks is essential to reduce the impact of communication delay in global cooperative software design. However, it is difficult due to the undetermined duration, delay and task sequence. Micro-estimation on demand refines the estimation of effort and duration for the tasks in the next short period. When using multiple component status transition graph (MCSTG) together with micro-estimation, we may easily obtain the possibility of a task and the available time for this task to be finished. With the extended MCSTG, the designers may reschedule the tasks according to the critical and importance so as to facilitate the cooperation

Many enterprise systems are developed in C++ language and most of them are standalone. Because the standalone software can not follow the new market environment, reengineering the standalone legacy systems into distributed environment becomes a critical problem. Some methods have been proposed on related topics such as design recovery, the identification of the component, modeling the interfaces of components and components allocation. Up to now, there does not exist a reengineering process for partition distributed environment, which will offer distinct advantages on horizontal scalability and performance over normal distributed solutions. This paper presents a new process to reengineer C++ legacy systems into the J2EE partition distributed environment. The process consists of four steps: translation from C++ to Java code; extraction of components using the cluster technology; modeling component interfaces and partition of the components in J2EE distribute environment. It has been applied to a large equity-trading legacy system which has proved to be successful.

Global cooperative software design is a formidable task because of the communication and coordination issues. While rescheduling of the tasks is necessary to reduce the impact of communication delay, the dependence of tasks must be well handled. Multiple component status transition graph (MCSTG) describes task dependence within and between components efficiently and support the handle of task dependence. A computer-aided notification mechanism was developed on the basis of MCSTG. The automatic mechanism avoids the task conflicts in coordination while minimizing the cost in project tracking.

Rapid developments in computer technology have resulted in greater reliance on distributed computing, typified by "client/server" or "subscriber/push" architectures. These servers provide central resource to individual clients on local area network or Internet systems. Unfortunately, frequent and unplanned network failures were routine, and downtime was not in hours, but in days. Cluster technology has solved the non-stop problem on local area network. However, most technologies including cluster today fail to ensure the non-stop Internet serving for its clients without stop while one or more servers have failed. With good performance on fault tolerance and availability, quorum system is very suitable to be applied in the distributed network system. In this paper, we modeled and developed a non-stop Internet service system based on a new quorum system, Circle Quorum System, for Boston Mutual Fund Broker, US. With three protocols, it provided highly available data services for clients on Internet.