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

1-7 Physical Data Replication

1-8 Logical Data Replication

1-9 Alternative Power Sources

1-10 Reliability of the Network is Paramount

1-11 Highly Available FDDI Network: Two Options

1-12 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 Three Data Centers with DWDM and Arbitrators

2-5 Three Data Centers with DWDM and Quorum Server

3-1 Three Data Centers 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

3-8 XP Series Primary and Secondary Volume Definitions

3-9 XP Series Disk Array Side File

3-10  XP Series Disk Array Configuration Checklist

4-1 Three Data Centers with Arbitrators

4-2 Failover Scenario with a Single Arbitrator

4-3 Failover Scenario with Two Arbitrators

4-4  Disaster Tolerant Checklist

4-5  Cluster Configuration Worksheet

4-6  Package Configuration Worksheet

4-7  Package Control Script Worksheet

4-8 EMC R1 and R2 Definitions

4-9 2 by 1 Node and Data Center Configuration

4-10 2 by 2 Node and Data Center Configuration

4-11 Bidirectional 2 by 2 Configuration

4-12 2 X 2 Node and Data Center Configuration with Consistency Groups

4-13 Sample syminq Output from a Node on the R1 Side

4-14 Sample syminq Output from a Node on the R2 Side

4-15 Parsing the Symmetrix Serial Number

4-16 Sample symrdf list Output from R1 Side

4-17 Sample symrdf list Output from R2 Side

4-18 Mapping HP-UX Device File Names to Symmetrix Units

4-19 Devices and Symmetrix Units in M by N Configurations

5-1 Sample ContinentalClusters Configuration

5-2 Sample Mutual Recovery Configuration

5-3 Continental Cluster After Recovery

5-4 Sample Local Cluster Configuration

5-5 Sample Cluster Configuration with Recovery Packages

5-6 Sample ContinentalClusters Recovery Groups

5-7 Sample Bi-directional Recovery Groups

5-8 ContinentalClusters Configuration Files

5-9 Recovery Checklist

6-1 Continental Cluster

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