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Understanding and Designing Serviceguard Disaster Tolerant Architectures Fifth Edition:

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HP Part Number: T1906-90024

Published: March 2009

Table of Contents

Printing History

Guide to Disaster Tolerant Solutions Documents

1 Disaster Tolerance and Recovery in a Serviceguard Cluster

Evaluating the Need for Disaster Tolerance

What is a Disaster Tolerant Architecture?

Understanding Types of Disaster Tolerant Clusters

Extended Distance Clusters
Extended Distance Cluster for RAC
Metropolitan Cluster
Continental Cluster
Support for Maintenance Mode in a Continentalclusters Environment
Continental Cluster With Cascading Failover
Three Data Center Architecture
Comparison of Disaster Tolerant Solutions

Disaster Tolerant Architecture Guidelines

Protecting Nodes through Geographic Dispersion
Protecting Data through Replication
Using Alternative Power Sources
Creating Highly Available Networking
Disaster Tolerant Cluster Limitations

Managing a Disaster Tolerant Environment

Additional Disaster Tolerant Solutions Information

2 Building an Extended Distance Cluster Using Serviceguard

Types of Data Link for Storage and Networking

Cross-Subnet Configurations in Extended Distance Clusters

Restrictions
Further Reading

Configuration requirements for all Extended Distance Clusters

Special requirements and recommendations for using LVM and SLVM in Extended Clusters

Special requirements and recommendations for using VxVM, CVM and CFS in Extended Clusters

Recommendations and requirements for Extended Clusters for RAC (EC RAC) configurations with Oracle RAC 10g or 11g

TCP/IP Network and Fibre Channel Data Links between the Data Centers

Separate Links for TCP/IP Networking and Fibre Channel Data:
Common WDM Links for both TCP/IP Networking and Fibre Channel Data:
Common SONET or SDH Links for both TCP/IP Networking and Fibre Channel Data:

Two Data Center Architecture

Advantages and Disadvantages of a Two Data Center Architecture

Two Data Center and Third Location Architectures

Additional Disaster Tolerant Solutions Information

List of Figures

1-1 High Availability Architecture.
1-2 Disaster Tolerant Architecture
1-3 Extended Distance Cluster
1-4 Metropolitan Cluster
1-5 Continental Cluster
1-6 Cascading Failover Data Center Distribution Using Metrocluster
1-7 Three Data Center Solution Overview
1-8 Physical Data Replication
1-9 Logical Data Replication
1-10 Alternative Power Sources
1-11 Reliability of the Network is Paramount
1-12 Highly Available FDDI Network: Two Options
1-13 Routing Highly Available Ethernet Connections in Opposite Directions
2-1 Two Data Centers with Cross-Subnet
2-2 Two Data Centers and Third Location with WDM and Arbitrators
2-3 Two Data Centers and Third Location with WDM and Quorum Server

List of Tables

1 Editions and Releases
2 Disaster Tolerant Solutions Document Road Map
1-1 Comparison of Disaster Tolerant Cluster Solutions
2-1 Link Technologies and Distances
2-2 Extended Distance Cluster support for HP-UX 11i v1
2-3 Extended Distance Clusters support for HP-UX 11i v2
2-4 Extended Distance Clusters support for HP-UX 11i v3
2-5 Supported System and Data Center Combinations

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