IBM S/390 Sysplex定时器

[1991] Digest of Papers. Fault-Tolerant Computing: The Twenty-First International Symposium Pub Date : 1991-06-25 DOI:10.1109/FTCS.1991.146653

T. Smith, William A. Moorman, Thao Dang

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引用次数: 1

摘要

介绍了IBM S/390 Sysplex定时器，它是一种集中容错时间参考，用于保持多个紧密耦合的IBM S/390之间的时间同步。基本的Sysplex Timer组织是四冗余的，它的封装是双工的。一个完全复制的星形互连拓扑通过专用光纤电缆为每个S/390客户端系统提供冗余定时器传输。介绍了Sysplex定时器设计中使用的技术以及用于验证设计的原型系统的性能测量。该设计被证明是经济和健壮的，在所有测试用例中保持冗余组件的紧密同步操作。电缆延迟补偿似乎特别有效。验证了定时器偏差小于300ns的样机在最坏情况下的运行

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The IBM S/390 Sysplex Timer

The IBM S/390 Sysplex Timer, a centralized fault-tolerant time reference used in maintaining time-of-day synchronism between multiple closely coupled IBM S/390's, is presented. The basic Sysplex Timer organization is quad redundant, and its packaging is duplex. A fully duplicated star interconnect topology provides redundant timer transmissions to every S/390 client system using dedicated fiber optic cables. The technology used in the design of the Sysplex Timer and measurements of the performance of the prototype system used in the validation of the design are presented. The design proved to be economic and robust, maintaining tightly synchronized operation of the redundant components for all test cases. Cable latency compensation appeared to be particularly effective. Worst case operation of the prototype with less than 300 ns of timer skew was verified.<>

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来源期刊

[1991] Digest of Papers. Fault-Tolerant Computing: The Twenty-First International Symposium

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