Avoiding System Problems
To avoid system problems related to misconfigurations, you need to have appropriate product documentation and business policies in place. The administrators making the changes should have access to caveats and a history log of past changes. Changes should be logged and a revision control system should be used so that you can quickly revert an old configuration.
System components will fail, but you can reduce consequential problems by investing in high availability or resiliency products and features. In the 1997 D. H. Brown survey of high availability providers, Hewlett-Packard was rated above average in its ability to detect and recover from failures. HP-UX provides dynamic memory resiliency, dynamic processor resiliency, ...
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