【摘要】 <正> 1.引言科学计算是一门迅速发展的学科,传统上,这些问题是用超级计算机或工作站机群来解决的。在互相独立的计算机上的并行程序设计是在PVM这样的网络并行计算和分布式编程环境下通过消息传递实现结点通信的。但是,由于编程者要了解底层消息传递的细节,基于PVM的并行编程十分困难,而科学家们又没有很多精力用于细致的程序设计。DSM(分布式共享内存)通过在工作站机群上建立一个共享内存的抽象层来降低这种程序设计的复杂度。更多还原

【Abstract】 Parallel programming on independent computers has done using systems that support for inter-computer communication through message passing,the programmer has to worry about low level message passing details- DSM mitigates the programming complexity by providing a shared memory abstraction on top of a network of computers. This paper describes PDSM,a flexible and efficient COW-based DSM system in Linux,which we developed to provide an easy to use tool to build high performance computing applications under fine-grained access control and application-specific protocols without complicating the system design.更多还原