CAJ | 학술논문

复合数据服务是由具有层次结构的多个原子数据服务组合而成,是实现跨域数据集成的一种手段.当底层数据服务发生数据更新时,数据更新如何自下而上经过多个中间复合数据服务传播到顶层,并在这个传播的过程中保障顶层复合数据服务的更新效率就成为一个挑战问题.针对这一问题,提出一种基于缓存的复合数据服务更新优化方法.该方法根据缓存点成本收益模型找出复合数据服务的最佳缓存点,并且通过 B 树索引查找缓存点,重用缓存数据,避免重复的更新计算.实验表明,该方法提高了复合数据服务的更新效率.
복합수거복무시유구유층차결구적다개원자수거복무조합이성,시실현과역수거집성적일충수단.당저층수거복무발생수거경신시,수거경신여하자하이상경과다개중간복합수거복무전파도정층,병재저개전파적과정중보장정층복합수거복무적경신효솔취성위일개도전문제.침대저일문제,제출일충기우완존적복합수거복무경신우화방법.해방법근거완존점성본수익모형조출복합수거복무적최가완존점,병차통과 B 수색인사조완존점,중용완존수거,피면중복적경신계산.실험표명,해방법제고료복합수거복무적경신효솔.
@@@@A composite data service is composed of a number of basic data services with hierarchical structure .It is one of the important approaches for cross - domain data integration .Once a primitive data service is updated ,it becomes a question of how to propagate the update bottom - up to the top level via several intermediate composite data services ,and to ensure the update efficiency of the data view .This paper intends to present a cache - based optimization method for the composite data services ,which is based on a cost - benefit model of cache points to find the best cache point of the composite data services .In addition ,when the data services update ,we can find the cache point quickly and efficiently to reuse the cached data through the B - tree index ,that avoid repeat of the updated calculation .Experiments show that our approach can effectively improve the update efficiency of the composite data services .