NetBase for MPE Reference Guide

Disaster Recovery Procedures for NetBase Shadowing Environments
12-9
Whether a planned or unplanned failover is used in this scenario, at some point it will be necessary
to get back to the original configuration. When it is time to go back to the original configuration of
master and shadow, there are several different ways that this can be done.
One method would be to make a store tape of the standalone system, and then restore it on to the
original master and switch back to the original directories. However, this process could take a long
time for the store and restores to complete. This method would involve a lot of “downtime” to users.
Another method would be to set the “standalone” system up as the master system and bring the old
master up as a shadow system. This method would minimize the amount of downtime to the users.
After the systems are brought up, then a planned failover could be performed to get the systems
back to their original master/shadow configuration.
Regardless of which method is chosen, the following steps must be performed on the old master
before any NetBase processing can begin.
On the OLD master system:
1. Check the NBM.IPC file and make sure it is empty. If it is not empty, it must be purged and
rebuilt:
PURGE NBM.IPC.NETBASE
BUILD NBM.IPC.NETBASE;REC=8187;MSG;DISC=31000,32
2. Delete any transactions in the export queue files:
PURGE EQ######.QUEUE.NETBASE