一种适用于构件系统的软件抗衰技术框架

Research on the Component Rejuvenation in Component-Based System

近年来,软件抗衰技术已被证实是解决软件衰老问题的有效途径。本文针对构件系统特点,将Micro-Reboot思想引入到软件抗衰技术中,也即将单个构件作为抗衰技术中检测和措施的对象,一方面使得每个构件能够长时间保持在良好状态,从而提高整个体系的性能,另一方面引入Request-Retry机制,提高系统的可用性。本文基于J2EE构件模型开发出一种新的软件抗衰技术框架,相关理论已成果并在江苏省科技攻关项目“城域网海量视听信息实时点播系统”中应用。

As a software application runs, it＇s performance and efficiency degrades over time due to factors such as memory fragmentation, counter inflation, and software errors. This is referred to as ＂Software Aging＂. ＂Software Rejuvenation＂ is a set of techniques to rectify this problem and return the software to its highest performance state. There are two methods to achieve this：1）a complete restart of the affected software system 2）＂Micro-reboot＂ which restarts only affe：ted components of a software systerm. When using ＂Micro-Reboot＂, a component undergoing restart may not be temporary available during the restart process. Therefore a ＂Request-Retry＂ protocol is required, to insure the continued operation of the application during this process. This new software rejuvenation framework is based on the J2EE component model.