Transaction adaption in system on mobile devices (SyD): techniques and languages

Resource constraints in wireless environment pose a great challenge to conventional transaction processing techniques. Current transaction processing schemes have limited flexibility, and cannot easily respond and adapt to the changes of runtime environment. In previous work, we proposed a QoS-aware transaction processing framework which supports graceful adaptation to resource changes in mobile devices. In this paper, we explore transaction adaptation techniques in more detail and address the following questions. How does QoS specification support adaptiveness in the transaction model? How can QoS specification specify and associate relaxed ACID properties? We design an XML-based transaction QoS specification language called TQDL to support transaction adaptation and use a distributed calendar application to show the transaction adaptation process. This work is done in the context of an ongoing research project called SyD, System on Mobile devices.