VERITAS Volume Manager 3.1 Administrator's Guide

Cluster Functionality
Cluster-related Volume Manager Utilities and Daemons
Chapter 7 321
restarted at any time. While the vxconfigd daemon is stopped, volume
reconfigurations cannot take place and other nodes cannot join the
cluster until the vxconfigd daemon is restarted. In the cluster, the
vxconfigd daemons on the slaves are always connected to the
vxconfigd daemon on the master. It is therefore not advisable to stop
the vxconfigd daemon on any clustered node.
If the vxconfigd daemon is stopped, different actions are taken
depending on which node has a stopped daemon:
• If the vxconfigd daemon is stopped on the slave(s), the master takes
no action. When the vxconfigd daemon is restarted on the slave, the
slave’s vxconfigd daemon attempts to reconnect to the master’s and
re-acquire the information about the shared configuration. (The
kernel’s view of the shared configuration is unaffected, and so is
access to the shared disks.) Until the slave vxconfigd daemon has
successfully rejoined to the master, it has very little information
about the shared configuration and any attempts to display or modify
the shared configuration can fail. In particular, if the shared disk
groups are listed (using the vxdg list command), they are marked
as disabled; when the rejoin completes successfully, they are
marked as enabled.
• If the vxconfigd daemon is stopped on the master, the vxconfigd
daemon on the slave(s) attempts to rejoin to the master periodically.
This is not successful until the vxconfigd daemon is restarted on
the master. In this case, the slave vxconfigd daemon information
about the shared configuration has not been lost, so configuration
displays are accurate.
• If the vxconfigd daemon is stopped on both the master and the
slave(s), the slave does not display accurate configuration information
until the vxconfigd daemon is restarted on both nodes and they
reconnect.
When the vxclustd daemon notices that the vxconfigd daemon is
stopped on a node, the vxclustd daemon restarts the vxconfigd
daemon.
NOTE With VxVM, the -r reset option to the vxconfigd daemon restarts the
vxconfigd daemon and creates all states from scratch. This option is not
available while a node is in the cluster because it causes the loss of
cluster information; if this option is used under these circumstances, the