High Availability Netweaver

The tasks for the system administrator depend on the high availability features that you have implemented. In general, you need to minimize both planned downtime and unplanned downtime for your SAP system. The tasks listed below are important to minimizing downtime in your system.

Getting Started

For a full checklist of what features you need to consider when designing high availability into your system, see General Checklist. Consider especially switchover software.

High availability is a technically complex area, and implementation considerations vary according to your system setup.

For technical guidance when developing a high availability strategy or when implementing a specific product or feature, contact the appropriate source, such as your SAP consultant or your hardware partner.

For more information, see SAP Note 803018 and the SAP High Availability documentation.

Technical System Landscape

For more information on a system landscape for high availability, see the Technical Infrastructure Guide – SAP NetWeaver 2004s at:

service.sap.com/installNW2004s ® Planning

Tasks on Demand

Reason	Task	More Information
System failure	Restore database	Database Administration
SAP system upgrade required	Upgrade SAP system	service.sap.com/upgrade service.sap.com/nw04upgrade ® Upgrade
Database upgrade required	Upgrade database	service.sap.com/instguides ® Other Documentation ® Database Upgrades
Operating system upgrade required	Upgrade operating system	Operating system documentation

Periodic Tasks

Frequency	Task	More Information
Regularly	Test switchover functionality	service.sap.com/ha ® Media Library ® Documentation ® Switchover
Regularly	Database backup, online or offline, possibly with split-mirror	Database Administration

How often you perform the periodic tasks depends on the requirements and nature of your installation.

For example, the frequency with which you expect a switchover to occur determines how often you test switchover functionality – if you expect frequent switchovers you need to frequently test switchover functionality.