Managing Serviceguard Eighteenth Edition, September 2010

NOTE: Keep in mind that the purpose of the LAD capabilities is to allow you do
maintenance on one or more nodes, or the entire cluster. If you want to do maintenance
on individual packages, or on elements of the cluster configuration that affect only one
package, or a few packages, you should probably use package maintenance mode; see
“Maintaining a Package: Maintenance Mode” (page 353).
What You Can Do
You can do the following.
• Halt a node (cmhaltnode (1m) with the -d option) without causing its running
packages to halt or fail over.
Until you restart the node (cmrunnode (1m)) these packages are detached —
not being monitored by Serviceguard.
• Halt the cluster (cmhaltcl (1m) with the -d option) without causing its running
packages to halt.
Until you restart the cluster (cmruncl (1m)) these packages are detached — not
being monitored by Serviceguard.
• Halt a detached package, including instances of detached multi-node packages.
• Restart normal package monitoring by restarting the node (cmrunnode) or the
cluster (cmruncl).
Rules and Restrictions
The following rules and restrictions apply.
• All the nodes in the cluster must be running A.11.20.
• All the configured cluster nodes must be reachable by an available network (not
necessarily a network that is configured into the cluster).
• You must be root user (superuser) to halt or start a node or cluster with Live
Application Detach, and to halt a detached package.
• Live Application Detach is not supported for SGeRAC clusters configured with
SLVM or ASM.
• Live Application Detach is not supported for clusters using the Veritas Cluster
Volume Manager (CVM) or Cluster File System (CFS).
• Live Application Detach is supported only for modular failover packages and
modular multi-node packages.
— You cannot detach legacy packages, but you can halt them and then detach the
modular packages.
— You cannot use Live Application Detach if system multi-node packages (such
as SG-CFS-pkg) are configured in the cluster.
See Chapter 6 (page 279) for more information about package types.
Managing the Cluster and Nodes 345