HP XP7 Storage - Manual (Page 66)

For large-scale system configurations using many hosts running HDLM, the
operational load for managing paths on individual hosts increases with the
size of the configuration. By linking HDLM and Global Link Manager, you can
centrally manage path information for multiple instances of HDLM and reduce
operational load. In addition, you can switch the operational status of paths
to perform system-wide load balancing, and centrally manage the system by
collecting HDLM failure information in Global Link Manager.
Global Link Manager collects and manages information about paths from
instances of HDLM installed on multiple hosts. Even if multiple users manage
these hosts, they can control and view this centralized information from client
computers.
The following figure is an example of a system configuration using HDLM and
Global Link Manager.
Figure 2-17 Example System Configuration Using HDLM and Global Link
Manager
Cluster Support
HDLM can also be used in cluster configurations.
2-46
HDLM Functions
Hitachi Dynamic Link Manager (for Windows®) User Guide