Enterprise Volume Manager (Multi-OS) Version 2.0D Network Administration Guide

5–16 Enterprise Volume Manager (Multi-OS) Network Administration Guide
Configuring the EVM Network
Example 3: EVM on Multiple Hosts for High Availability
The configuration in Figure 5–3 adds clustering to the application server. The
configuration for Computers 2 and 3 includes dual-bus fault tolerance using HP
Secure Path. See “Selecting a Supported EVM-SAN Configuration” on page 5–14 for
a more detailed discussion.
Figure 5–3: EVM-SAN configuration with clustered host computers
Cluster Support
The following sections specify cluster support for each supported operating system.
HP Tru64 UNIX
The EVM Host Agent V2.0D for HP Tru64 UNIX is cluster-aware (however, Tru64
UNIX 5.1A patch BL3 does not support the EVM host cluster feature).
When the EVM host agent is present on a cluster, EVM provides the following:
• EVM jobs can mount BCVs on the cluster. The volumes are visible to all of the
hosts in the cluster.
• EVM displays one host icon that represents the cluster.
• EVM reports a cluster property of
Ye s for a host icon that represents a cluster.
• EVM displays icons of volumes that are associated with the cluster.
CXO8022A
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EVM
Host
Agent
EVM
Host
Agent
Fibre Channel SAN
Tape
Drive
Switch
Switch
StorageWorks
Storage Systems
LAN
EVM Server