Designing Disaster Tolerant High Availability Clusters:

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 XP CA

1-7 Cascading Failover Data Center Distribution Using EMC SRDF

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 FibreChannel Hubs

2-2 Two Data Centers with FibreChannel Switches and FDDI

2-3 Two Data Centers with DWDM Network and Storage

2-4 Two Data Centers and Third Location with DWDM and Arbitrators

2-5 Two Data Centers and Third Location with DWDM and Quorum Server

3-1 Two Data Centers and Third Location with Arbitrators

3-2 Failover Scenario with a Single Arbitrator

3-3 Failover Scenario with Two Arbitrators

3-4  Disaster Tolerant Checklist

3-5  Cluster Configuration Worksheet

3-6  Package Configuration Worksheet

3-7  Package Control Script Worksheet

4-1 Sample Continentalclusters Configuration

4-2 Sample Mutual Recovery Configuration

4-3 Continental Cluster After Recovery

4-4 Multiple Recovery Pair Configuration in a Continental Cluster

4-5 Sample Local Cluster Configuration

4-6 Sample Cluster Configuration with Recovery Packages

4-7 Sample Continentalclusters Recovery Groups

4-8 Sample Bi-directional Recovery Groups

4-9 Continentalclusters Configuration Files

4-10 Recovery Checklist

4-11 Oracle RAC Instances in a Continentalclusters Environment

4-12 Sample Oracle RAC Instances in a Continentalclusters Environment After Failover

4-13 Continentalclusters Configuration Files in a Recovery Pair with RAC Support

5-1 XP Series Primary and Secondary Volume Definitions

5-2 XP Series Disk Array Side File

5-3 Disaster Tolerant Cluster

6-1 Configuration of virtual disks and DR groups

6-2  EVA Configuration Checklist

6-3 EVA Command View for the WWN Identifier

6-4 EVA Command View DR Group Properties

7-1 EMC R1 and R2 Definitions

7-2 Sample syminq Output from a Node on the R1 Side

7-3 Sample syminq Output from a Node on the R2 Side

7-4 Parsing the Symmetrix Serial Number

7-5 Sample symrdf list Output from R1 Side

7-6 Sample symrdf list Output from R2 Side

7-7 Mapping HP-UX Device File Names to Symmetrix Units

7-8 2 X 2 Node and Data Center Configuration with Consistency Groups

7-9 Devices and Symmetrix Units in M by N Configurations

7-10 2 by 1 Configuration

7-11 Bidirectional 2 by 2 Configuration

8-1 Continental Cluster with Cascading Failover

8-2 Symmetrix Configuration for Cascading Failover

8-3 Example of Symmetrix Device Setup

8-4 Primary Device Group

8-5 Secondary Device Group

8-6 Recovery Device Group

8-7 Mirroring from the Primary to the Secondary Symmetrix

8-8 Mirroring from the Secondary to the Recovery Symmetrix

8-9 Data Refresh in Steady State

8-10 Failure of Primary Site in Primary Cluster

8-11 Failure of Secondary Site in Primary Cluster

8-12 Failure of Entire Primary Cluster