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

Building a Continental Cluster
Building the ContinentalClusters Configuration
Chapter 5224
#### for each ServiceGuard package that will be started on
the ####
#### recovery cluster when the cmrecovercl(1m) command is
issued. ####
## ##
####
#### A recovery group consists of a primary package running
on ####
#### one cluster, and a recovery package that is ready to
run on a ####
#### different cluster. In some cases, a data receiver
package runs ####
#### on the same cluster as the recovery package, and in
some cases, ####
#### a data sender package runs on the same cluster as the
primary ####
## ## pac kage .
####
## ##
####
#### During normal operation, the primary package is
running an ####
#### application program on the primary cluster, and the
recovery ####
#### package, which is configured to run the same
application, is ####
#### idle on the recovery cluster. If the primary package
performs ####
#### disk I/O, the data that is written to disk is
replicated ####
#### and made available for possible use on the recovery
cluster. ####
#### For some data replication techniques, this involves
the use of ####
#### a data receiver package running on the recovery
cluster. ####
#### In the event of a major failure on the primary
cluster, the ####
#### user issues the cmrecovercl(1m) command to halt any
data ####
#### receiver packages and start up all the recovery
packages ####
#### that exist on the recovery cluster.
####
## ##
####