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 Continentalclusters Version A.04.02 Release Notes Second Edition > Chapter 1 Continentalclusters Version A.04.02 Release Notes Second Edition

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Continentalclusters employs semi-automatic failover of Serviceguard packages from one cluster to another following a cluster event that indicates serious disruption of service on one of the clusters. The product consists of a set of configuration, managment commands, and a set of daemons that monitors and sends notification of cluster events

The A.04.02 version contains the following enhancements:

  • Support for Oracle RAC in an Environment Using EMC/SRDF

  • Support for mixed clusters consisting of either HP 9000 servers and/or Integrity servers on HP-UX 11i v2 September 2004 update. The Serviceguard clusters participating in a Continentalclusters environment can consist of both HP 9000 servers and HP Integrity servers, or only HP 9000 servers, or only HP Integrity Servers machines.

NOTE: For mixed cluster requirements on Serviceguard, refer to the Serviceguard version A.11.16 Second Edition release notes.

The Continentalclusters product has the following basic features:

  • Continentalclusters works with any type of data replication. A set of guidelines for integrating your data replication technology can be found in chapter 4 of the Designing Disaster Tolerant High Availability Clusters manual on http://www.docs.hp.com.

    Continentalcluster provides a pre-integrated data replication solution using HP StorageWorks Continuous Access XP or the EMC/ SRDF with the separately puchased products Metrocluster CA XP and Metrocluster/SRDF. Instead of using the pre-integrated data replication solution a customer-selected data replication solution can be chosen by following the integration guidelines.

  • A two-data center basic configuration, consisting of one primary cluster and one 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 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 separately purchased Enterprise Cluster Master Toolkit product. Other customer-selected logical data replication solutions can be implemented as well.

  • Cluster monitoring is carried out over WAN or LAN connections. You can 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 does not make any sense.


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