Solution:
The process of transaction can guarantee the reliability of business applications. Locking resources is widely used in distributed transaction management (e.g; two phase commit, 2PC) to keep the system consistent. The locking mechanism, however, potentially results in various deadlocks. In service oriented architecture, the deadlock problem becomes even worse because multiple transactions try to lock shared resources in the unexpectable way due to the more randomicity of transaction requests, which has not been solved by existing research results. In this paper, we investigate how to prevent local deadlocks, caused by the resource competition among multiple sub-transactions of a gl obal transaction, and global deadlocks from the competition among different global transactions. We propose a replication based approach to avoid the local deadlocks, and a timestamp based approach to significantly mitigate the global deadlocks. A general algorithm is designed for both local and global deadlock prevention. The experimental results demonstrate the effectiveness and efficiency of our deadlock prevention approach. Further, it is also proved that our approach provides higher system performance than traditional resource allocation schemes.
This is the required answer.
Answer:
Joint Application Development (JAD)
Explanation:
Joint Application Development is a method of application development that lay emphasis on the up-front aspect of the application development cycle whereby steady communication between the designers and the intended users of the application under development by coming together in collaborative workshop styled discussions known as JAD sessions involving the mediators, facilitator, observers, end users, experts, and developers. As such with JAD process application development result in fewer errors high quality and is completed in lesser time.
The answers are 1, 3, and 5.
