02-16-2010
Comparing Cluster Members
Does anyone know of a good utility that will do a binary compare of all the files on two cluster members? We are looking for something we can run on a monthly batch basis to monitor for configuration drift between AIX/HACMP and Solaris/VCS cluster member pairs, use as an ad hoc diagnostic tool when an app runs fine on one cluster node but not the other, or to compare test and prod systems to figure out why a problem cannot be reproduced in the test environment.
I realize tight system management procedures are the best preventative, but when you have eight sysadmins with root (sudo) access and another dozen people with varying access to app directories, some type of drift is inevitable. We need something that can at least help us prove that the machines are identical so we can direct diagnostic efforts back to the application.
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cm(5) File Formats Manual cm(5)
NAME
cm - cluster monitor for high availability clusters
Remarks
Cluster operations require the installation of the optional Serviceguard or Serviceguard Extension for RAC software, which is not included
in the standard HP-UX operating system.
DESCRIPTION
Serviceguard and Serviceguard Extension for RAC are high availability products which provide an environment such that after a failure of a
node, services (applications) can be up and running again on another node within a very short amount of time. In addition, Serviceguard
Extension for RAC is the enabling software for the Real Application Clusters (RAC). Working with the basic Serviceguard product, Service-
guard Extension for Faster Failover allows configuration of clusters for optimized failover.
Commands
The following set of commands is used to configure a high availability cluster:
cmquerycl(1M)
cmmakepkg(1M)
cmcheckconf(1M)
cmapplyconf(1M)
The following commands are used to run or halt a cluster:
cmruncl(1M)
cmhaltcl(1M)
cmrunnode(1M)
cmhaltnode(1M)
cmviewcl(1M)
Once a cluster is formed, the following commands are provided for manual operation on high availability packages:
cmrunpkg(1M)
cmhaltpkg(1M)
cmmodpkg(1M)
The following commands are used within a package control script to control the services and networks configured for a package:
cmrunserv(1M)
cmhaltserv(1M)
cmmodnet(1M)
A command is provided to aid in migrating from a SwitchOver/UX configuration to a Serviceguard cluster:
cmmigrate(1M)
This command is not applicable with Serviceguard Extension for RAC.
SEE ALSO
Managing Serviceguard.
Configuring RAC Clusters with Serviceguard Extension for RAC.
Requires Optional Serviceguard Software cm(5)