A CENSUS OF TANDEM SYSTEM AVAILABILITY BETWEEN 1985 AND 1990

被引：89

作者：

GRAY, J

机构：

[1] Tandem Computers Inc., Cupertino

[2] Tandem Computers Inc., Cupertino, California 95014

来源：

IEEE TRANSACTIONS ON RELIABILITY | 1990年 / 39卷 / 04期

关键词：

Availability; End to end; Fault-tolerance; Tandem;

D O I：

10.1109/24.58719

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

Tandem computer systems are designed to be single-fault tolerant. This paper takes a census of customer outages reported to Tandem. The census shows a clear improvement in the reliability of hardware and maintenance. It indicates that now (1990) software is the major source of reported outages (62%), followed by system operations (15%). This is a dramatic shift from the statistics in 1985. Even discounting systematic under-reporting of operations and environmental outages, the conclusion is clear: Hardware faults and hardware maintenance are no longer a major source of outages. As the other components of the system become increasingly reliable, software necessarily becomes the dominant cause of outages. Achieving higher-availability requires: 1) improvement in software quality and software-fault tolerance, 2) simpler operations, and 3) tolerance of operational faults. © 1990 IEEE

引用

页码：409 / 418

页数：10