Chapter 13. Availability Metrics
Imagine you are in the middle of a stock transaction on the Internet and then the application hangs for more than half an hour. Or, it is Friday morning and you are running your quarter-end financial report, which is due Monday, and your system crashes and stays down for 96 hours. Or, you are doing a business transaction on a well-known web site and the server supporting it crashes, rendering the site unavailable for a prolonged time. Scenarios such as these are far more frequent than desirable and are incurring costs and decreasing productivity.
The following was from a financial news posted on the Netscape Web site not long ago:
Nasdaq will extend trading for one hour today, to 5 P.M. EDT, after a network problem ...
Get Metrics and Models in Software Quality Engineering, Second Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
