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

5–20 Enterprise Volume Manager (Multi-OS) Network Administration Guide
Configuring the EVM Network
Node Visibility to the Management Appliance
Each EVM network is limited only by the Management Appliance visibility of SAN
nodes. If a host computer is visible to the Management Appliance, the host storage is
displayed on the EVM GUI and can be added to the EVM network.
Storage System Limitation
Keep these storage system limitations in mind when planning your EVM network:
• EVM V2.0D can simultaneously support up to 25 HSG-based storage systems and
up to 16 HSV-based storage systems. However, as the number of storage systems
increases, EVM job performance and user interface responsiveness can degrade.
Actual performance depends on several factors, including the number of jobs
running, the number of steps and complexity of the jobs, and I/O activity on the
storage systems and hosts.
• EVM is compatible only with multibus configurations.
NOTE: Changing from a transparent to multibus failover configuration is not just a matter of
issuing CLI commands, but also involves installing hardware and possibly software, such
as host bus adapters, cabling, switches, and HP Secure Path.
• EVM V2.0D must have the appropriate version of HP Secure Path software
installed on the host. Refer to Table 5–6 through Table 5–11, beginning on
page 5–6 for version information.
Multiple Storage System Support
Performance depends on several factors, including the number of jobs running, the
number of steps and complexity of the jobs, and I/O activity on the storage systems
and hosts.
EVM provides three user-selectable features to improve performance:
• Available Storage Systems
• Storage System Refresh Interval
• Detect Storage Properties
These features are covered below.