Continentalclusters Version A.07.01 release notes, August 2010 (T2346-90015)

Metrocluster Continuous Access EVA, and Metrocluster with EMC SRDF. An
alternative to using the pre-integrated data replication solution a customer-selected
data replication solution can be chosen by following the integration guidelines.
• A recovery pair in a Continentalclusters consists of one primary cluster and one
recovery cluster. One or more recovery pairs can be configured in a continental
cluster with a common recovery cluster. Failover of a specific package occurs in
one direction from the primary cluster to the recovery cluster. Each data center
can serve as both primary and recovery cluster for different packages. In the
cascading failover configuration, the primary cluster can be a metropolitan cluster
using EMC SRDF or Continuous Access XP.
• Logical data replication is also possible using the Oracle Standby Database.
Template files and additional information are included in the Oracle Standby
Database portion of the Enterprise Cluster Master Toolkit product (a separately
purchased product). Other customer-selected logical data replication solutions
can be implemented as well.
• Cluster monitoring is carried out over LAN or WAN connections. Use any LAN
or WAN connection; however, some data replication methods may require high
speed connections such as T1, T3, E3/ES or ATM leased lines or switched lines.
Support for Maintenance Mode
At the recovery cluster, recovery groups can be moved into maintenance mode. For
recovery groups that are moved into the maintenance mode, recovery using the
cmrecovercl command or recovery package startup using the cmrunpkg or the
cmmodpkg command is prevented. When a recovery group is in the maintenance mode,
the availability of the primary packages are not impacted. The primary package can
be started and failed over locally at the primary cluster.
The cmrecovercl command is enhanced to provide new options, {-e|-d [f]} -g
<recovery group> to move a specified recovery group in or out of the maintenance
mode. Also, the cmviewconcl command is enhanced to display the maintenance
mode for a recovery group.
NOTE: The maintenance mode is an optional feature. To enable the maintenance
mode, configure a shared disk (non-replicated) with a file system on all recovery clusters
and the Continentalclusters configuration file must be specified using the
CONTINENTAL_CLUSTER_STATE_DIR parameter.
For more information on using this command in your environment, see the Designing
Disaster Tolerant HA Clusters using Metrocluster and Continentalclusters document.
Support for Disaster Recovery Rehearsal Operations
The DR rehearsal feature of Continentalclusters rehearses recovery for a recovery group
without impacting the availability of the primary package. The DR Rehearsal feature
What’s In This Version 7