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    • 3. 发明授权
    • Distributed shared data management system for controlling structured
shared data and for serializing access to shared data
    • 分布式共享数据管理系统,用于控制结构化共享数据和串行访问共享数据
    • US5649102A
    • 1997-07-15
    • US348099
    • 1994-11-25
    • Masahiko YamauchiSatoshi YoshizawaHideki MurayamaTakehisa HayashiAkira KitoHiroshi YashiroTsutomu GotoKimitoshi YamadaToru Horimoto
    • Masahiko YamauchiSatoshi YoshizawaHideki MurayamaTakehisa HayashiAkira KitoHiroshi YashiroTsutomu GotoKimitoshi YamadaToru Horimoto
    • G06F9/46G06F15/16
    • G06F9/52
    • A distributed shared memory management system for a distributed shared memory computer system having a plurality of computers interconnected by a network, each computer having an independent address space and logically sharing data physically distributed to a storage of each computer. Each computer running a program for reading/changing the shared data includes a coherence control designation command for designating to enter a mutual exclusion state in which two or more computers cannot change the logically single shared data, a coherence control release command for designating a release of the mutual exclusion state, and a coherence control execution command for reflecting the contents of the shared data changed between the coherence control designation command and the coherence control release command, upon the logically single shared data in another computer. At least one of the plurality of computers includes a request message queue for storing a coherence control request message issued by the coherence control execution command when the coherence control designation command is executed. The coherence control designation command includes data for designating the order of reading/changing the shared data, and the request message queue includes a counter for storing a current state regarding the control of the order of reading/changing the shared data and a unit for storing a value regarding the control of the order of reading/changing the shared data.
    • 一种用于分布式共享存储器计算机系统的分布式共享存储器管理系统,其具有通过网络互连的多个计算机,每个计算机具有独立的地址空间,并且逻辑上共享数据,物理分布到每个计算机的存储器。 运行用于读取/更改共享数据的程序的每个计算机包括用于指定进入两个或多个计算机不能改变逻辑上单个共享数据的互斥状态的相干控制指定命令,用于指定释放的相干控制释放命令 相互排除状态,以及用于反映在相干控制指定命令和相干控制释放命令之间改变的共享数据的内容的相干控制执行命令,在另一计算机中的逻辑单个共享数据上。 当执行相干控制指定命令时,多个计算机中的至少一个包括用于存储由相干控制执行命令发出的相干控制请求消息的请求消息队列。 相干控制指定命令包括用于指定读取/改变共享数据的顺序的数据,并且请求消息队列包括用于存储关于读取/改变共享数据的顺序的控制的当前状态的计数器和用于存储的单元 关于控制读取/改变共享数据的顺序的值。