What Is Hdlm - Hitachi XP P9500 User Manual

What is HDLM?

With the widespread use of data warehousing and increasing use of
multimedia data, the need for high-speed processing of large volumes of data
on networks has rapidly grown. To satisfy this need, networks dedicated to
the transfer of data, such as SANs, are now being used to provide access to
storage systems.
HDLM manages the access paths to these storage systems. HDLM provides
the ability to distribute loads across multiple paths and switch to another path
if there is a failure in the path that is currently being used, thus improving
system availability and reliability.
Figure 1-1 Between Hosts and Storage Systems on page 1-2
connections between various hosts and storage systems. A server on which
HDLM is installed is called a host.
HDLM supports the following storage systems:
• Hitachi AMS2000/AMS/WMS/SMS series
• Hitachi USP
• Lightning 9900 series
• Lightning 9900V series
• Thunder 9500V series
• Universal Storage Platform V/VM
• Virtual Storage Platform
1-2
Figure 1-1 Between Hosts and Storage Systems
Overview of HDLM
Hitachi Dynamic Link Manager User Guide (for Linux(R))
illustrates the