分布式合作缓存中的全局向量时钟模型

在分布式合作缓存技术对中文件块的查找与替换是一个全局性的管理问题。针对在中系统中由于局部时钟不一致而造成的块查找与块替换决策失误的问题。本文提出了全局向量时钟模型ＧＶＴ的概念，并通过维护基于全局向量的最老时戳表来完成块查找与块替换操作。全局向量时钟对传统的向量时钟进行了改进，提供了多种方式用于时序关系的判断。

GLOBAL VECTOR TIME OF DISTRIBUTED COOPERATIVE CACHING

The distributed cooperative caching technology is an efficient method that can improve the performance of cluster file system. The access and replacement for the file blocks on cooperative caching is a global management problem. To solute the mistake decision of checking block and replacing block that is made by the non consistent physical clock on each node of workstation clusters, in this paper we presented a concept of global vector time (GVT) and preserve the oldest block time stamp list and manage cooperative caching.