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HACMP Installation and Cluster Definition 113
For cascading resource groups the failed node is going to reaquire its
resources, once it is up and running again. So, you have to restart HACMP on
it through
smitty clstart and check again for the logfile, as well as the
clusters status.
Further and more intensive debugging issues are covered in Chapter 7,
“Cluster Troubleshooting” on page 143.
4.5 Cluster Snapshot
Now that the actual installation is finished, the cluster is well documented in
the planning sheets, all information from there has been implemented in the
HACMP ODM, and the cluster is verified and synchronized; provided the
initial testing didn’t bring up any curiosities, you should save this working
configuration in a cluster snapshot.
The cluster snapshot utility allows you to save, in a file, a record of all the
data that defines a particular cluster configuration. This facility gives you the
ability to recreate a particular cluster configuration, a process called applying
a snapshot, provided the cluster is configured with the requisite hardware and
software to support the configuration.
You can perform many of the cluster snapshot utility operations, such as
saving a configuration and applying a saved configuration, using the HACMP
for AIX VSM application (
xhacmpm). For more information, see the
administrative facilities chapter in the
HACMP for AIX, Version 4.3: Concepts
and Facilities
, SC23-4276, and the online help information available with the
application.
In addition, a snapshot can provide useful information for troubleshooting
cluster problems. Because the snapshots are simple ASCII files that can be
sent via e-mail, they can make remote problem determination easier.
You can also add your own custom snapshot methods to store additional
user-specified cluster and system information in your snapshots. The output
from these user-defined custom methods is reported along with the
conventional snapshot information.
You cannot use the cluster snapshot facility in a cluster with nodes
concurrently running different versions of HACMP for AIX.
Note