8 Designing a Three Data Center Disaster Recovery Solution

This chapter describes Three Data Center architecture through the following topics:

•“Overview of 3DC DR Solution” (page 413)

•“Infrastructure Requirements” (page 429)

•“Configuring an P9000 or XP 3DC DR Solution” (page 429)

•“Deploying a Complex Workload in Three Data Center Solution using SADTA” (page 447)

•“Verifying the Three Data Center Environment” (page 461)

•“Automatic Failover between DC1 and DC2” (page 464)

•“Recovery at the third data center (DC3)” (page 466)

•“Failback Scenarios” (page 466)

•“Configuring Remote Array RAID Manager Instances for RCMD (Optional)” (page 471)

•“Timing Considerations” (page 471)

•“Bandwidth for Continuous Access and Application Recovery Time” (page 472)

•“Data Maintenance with the Failure of a Metrocluster with Continuous Access for P9000 and XP Failover” (page 473)

•“Additional Reading” (page 474)

NOTE: For additional information, refer to the Release Notes for your Metrocluster and Continentalclusters products and the documentation for your storage solution.

Overview of 3DC DR Solution

Three Data Center Disaster Recovery Solution (3DC DR Solution) is a fully redundant disaster recovery solution that integrates Serviceguard, Metrocluster with Continuous Access for P9000 and XP, Continentalclusters and the HP StorageWorks P9000 or XP Three Data Center (3DC) Replication. This solution provides the highest level of application availability by allowing multi-level failover and recovery mechanism. It includes bi-directional automatic failover across sites within a metropolitan region and fully automated push-button recovery mechanism at the far site. The solution supports a range of application architectures, from single instance applications which run on one server, multi instance applications that run simultaneously on multiple servers and complex applications involving multiple tiers. These all can be deployed seamlessly and recovered without impacting application performance. This solution is an ideal choice for critical disaster tolerant applications in today’s world of demanding compliance requirements.

Figure 63 (page 414) shows the 3DC DR solution configuration.

Overview of 3DC DR Solution 413