Q

Difference between a system copy and a DRP system

We have purchased a new DR server because our old DR server configuration is low and filled. We have installed Linux as the OS in new DR server, not SAP. We mount the same partitions as in old DR server, only the capacity is higher.

We're wondering, if we restore the latest offline backup taken from PRD server and restore into the new DR server,

will it work? Is it not necessary to install SAP again in DR server? Kindly clarify.

You only need to restore the backup taken on the PRD server and restore it to the DRP system. You should have installed and configured SAP and database beforehand. The SAP and Oracle profiles should have been maintained when the system was initially installed.

In an Informix or Oracle environment, you only need the BRBACKUP log files, the database backup and archive logs to get the system up and running again. In other environments, in which native database tools are used, the database backup and archive logs should be sufficient. It is more or less the same as when you are doing a homogeneous system copy. You don't need to re-install SAP when rebuilding acceptance with a backup of production. The big difference between a system copy and a DRP is that no or few post-processing is needed as the system SID does not change.

Needless to say, the DRP scenario needs to be rehearsed on a regular basis.

This was first published in November 2005

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