NonStop NS-Series Planning Guide (H06.03+)

HP Integrity NonStop NS-Series Planning Guide—529567-004

8-1

Planning for System Availability and

Maintenance

This section describes advance planning required for minimizing the total number of

minutes that an application or system is unavailable.

Related Reading

This section suggests strategies and techniques for increasing the availability of your

system. These manuals describe those subjects in detail:

•

Availability Guide for Application Design

•

Availability Guide for Change Management

•

Availability Guide for Problem Management

•

DSM/SCM Event Management Programming Manual

•

DSM/SCM Quick Reference Guide

•

DSM/SCM User’s Guide

•

Integrity NonStop NS-Series Operations Guide

For abstracts of these manuals, refer to Appendix C, Guide to Integrity NonStop

NS-Series Server Manuals.

System Outage

An outage is time during which your system is not capable of doing useful work. From

the end user’s perspective, an outage is any time an application is not available.

In this guide, outages are categorized as either planned outages or unplanned

outages. A planned outage is time during which a system is scheduled to be shut down

(taken offline), usually for reconfiguration that cannot be performed while the system

and applications are operational (online). An unplanned outage is system or application