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分布式共享存储(DSM)使得在分布式存储机器上,对显式消息传递编程的需要得到减轻.为降低存储访问延迟,DSM系统将数据复制多个拷贝.文中考查了几种用于控制因伪共享问题造成的存储抖动的方法,提出了一种新的存储一致性协议:写者拥有协议,它在运行时检测并消除伪共享.迭代运算中,由于数据在每次迭代中被相似地存取,写者拥有协议只要消除一次伪共享,所以额外开销非常小.实验数据表明,写者拥有协议通常情况下优于已有的协议.
Distributed shared storage (DSM) makes the need for programming explicit messaging lighter on distributed storage machines. To reduce storage access latency, the DSM system copies data to multiple copies. This paper examines several methods for controlling storage jitter caused by pseudo-sharing problems and proposes a new storage coherency protocol: The writer has a protocol that detects and eliminates spurious shares at runtime. In iterative computation, since the data is accessed similarly in each iteration, the writers own the protocol so long as the pseudo-sharing is eliminated once, so the overhead is very small. Experimental data show that writers own the agreement is usually better than the existing agreement.