OSF DCE Administration Guide--Core Components

Chapter 37. Handling Network Reconfigurations
This chapter describes the procedures to handle network reconfigurations that change the
locations of registry replicas. Specifically, this chapter covers the following:
• Changing the master registry site
• Removing a node from the network
• Handling network address changes
To perform the procedures in this chapter, you must be logged into the network registry
account via an administrative account.
37.1 Changing the Master Replica Site
The machine that runs the master replica server must be available at all times. If you are
planning to remove this machine from your network or to shut it down for an extended
period, you need to change the site of the master replica.
The preferred method for changing the master registry site is to use the dcecp registry
set command to reverse the roles of the master server and a slave server. In other words,
make the master the slave and the slave the master.
When you invoke the dcecp registry set command, the following occurs:
1. The current master sends all pending updates and its propagation queue to the
replica designated as the new master.
2. The designated new master reads the current master’s replica list to obtain
information required for it to manage propagation to the slaves.
3. When the designated new master has obtained all necessary information from the
current master, it becomes the new master, and the current master becomes a slave.
Because this orderly and complete transfer of information ensures that no data is lost, the
dcecp registry set command is the preferred method to move the master registry to
another machine when the registry servers at the master and slave sites are operating
normally. Note that the dcecp registry set -master command is also available to change
a replica from a slave to the master. However, because the dcecp registry set -master
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