Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Physical Data Replication for ContinentalClusters Using Continuous Access XP
Maintaining the Continuous Access XP Data Replication Environment
Chapter 6 321
Maintaining the Continuous Access XP Data
Replication Environment
There might be situations where a package has to be taken down for
maintenance purposes without having the package move to another
node. The following procedure is recommended for normal maintenance
of ContinentalClusters:
1. Shut down the package with the appropriate MC/ServiceGuard
command. Example:
# cmhaltpkg <pkg_name>
2. Distribute the ContinentalClusters configuration changes. On the
primary cluster:
# cmapplyconf -P <pkgconfig>
On the recovery cluster:
# cmapplyconf -P <bkpkgconfig>
3. Start up the package with the appropriate MC/ServiceGuard
command. Example:
# cmmodpkg -e <pkg_name>
NOTE Never enable package switching on both the primary package and
the recovery package.
4. To apply a new ContinentalClusters configuration shut down any
monitor packages (ccmonpkg), run cmapplyconcl and then restart
the monitor packages.
Rescynchronizing
After certain failures, data are no longer remotely protected. In order to
restore disaster-tolerant data protection after repairing or recovering
from the failure, you must manually run the command pairresync.