Continentalclusters Version A.05.01 Release Notes, December 2005 (T2346-90007)

Continentalclusters Version A.05.01 Release Notes
What’s In this Version
Chapter 16
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 CA 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 WAN connections. Use any
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.
NOTE Continentalclusters can co-exist with the Advanced Tape Services (ATS)
feature of Serviceguard. However, an ATS package must not be
configured as a Continentalclusters package. With ATS, a single tape
drive (or set of tape drives) is shared between two nodes within a cluster
of up to four nodes. All of the tape drives are located within a single data
center. If the power were to be lost, the tape drives would not be
accessible even if the package were to be failed over to the other data
center with a Continentalclusters package. Therefore, using ATS in a
Continentalclusters package is not practical.
Support for Oracle 10g RAC Database Instance
Recovery
Upon failure of the primary cluster, the Oracle 10g RAC database
instance, configured to be running on the primary cluster, will be
recovered on the recovery cluster. This feature is supported for the
environment using SLVM for volume management and CA XP, or CA
EVA, or EMC SRDF for data replication between the Serviceguard
clusters. The corresponding Metrocluster products Metrocluster CA XP,
or Metrocluster CA EVA, or Metrocluster with EMC SRDF is required.