HP Hitachi Dynamic Link Manager Software - Manual (Page 3)

Contents
Preface.................................................................................................xv
Intended audience...................................................................................................xvi
Product version.......................................................................................................xvi
Release notes..........................................................................................................xvi
Document revision level...........................................................................................xvi
Document organization...........................................................................................xvii
Related documents.................................................................................................xvii
Document conventions...........................................................................................xviii
Conventions for storage capacity values....................................................................xix
Accessing product documentation.............................................................................xix
Getting help............................................................................................................xix
Comments...............................................................................................................xx
1 Overview of HDLM................................................................................1-1
What is HDLM?.......................................................................................................1-2
HDLM Features.......................................................................................................1-2
2 HDLM Functions...................................................................................2-1
Devices Managed by HDLM......................................................................................2-3
System Configuration..............................................................................................2-3
System Configuration Using an FC-SAN..............................................................2-3
System Configuration Using an IP-SAN...............................................................2-5
LU Configuration.....................................................................................................2-7
Program Configuration............................................................................................2-8
Position of the HDLM Driver and HDLM Device........................................................2-10
Logical Device Files for HDLM Devices....................................................................2-11
Distributing a Load Using Load Balancing................................................................2-14
Paths To Which Load Balancing Is Applied........................................................2-15
When Using the Thunder 9500V Series, or Hitachi AMS/WMS series..........2-15
When Using Other Than the Thunder 9500V Series and Hitachi AMS/WMS
Series...................................................................................................2-16
Load Balancing Algorithms...............................................................................2-17
Performing Failovers and Failbacks Using Path Switching.........................................2-18
Automatic Path Switching................................................................................2-19
Automatic Failovers...............................................................................2-19
iii
Hitachi Dynamic Link Manager User Guide for Linux ®