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

Contents
Preface.................................................................................................xiii
Intended audience...................................................................................................xiv
Product version....................................................................................................... xiv
Release notes..........................................................................................................xiv
Document revision level........................................................................................... xiv
Document organization.............................................................................................xv
Related documents...................................................................................................xv
Document conventions.............................................................................................xvi
Conventions for storage capacity values.................................................................... xvi
Accessing product documentation............................................................................ xvii
Getting help........................................................................................................... xvii
Comments.............................................................................................................xviii
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
LU Configuration.....................................................................................................2-5
Program Configuration............................................................................................ 2-6
Position of the HDLM Driver and HDLM Device..........................................................2-8
Logical Device Files for HDLM Devices...................................................................... 2-9
Distributing a Load Using Load Balancing................................................................2-10
Paths to Which Load Balancing Is Applied.........................................................2-12
When Using the Thunder 9500V Series, or Hitachi AMS/WMS series..........2-12
When Using Other Than the Thunder 9500V Series and Hitachi AMS/WMS
Series................................................................................................... 2-13
Load Balancing Algorithms...............................................................................2-14
Performing Failovers and Failbacks Using Path Switching......................................... 2-15
Automatic Path Switching................................................................................ 2-16
Automatic Failovers............................................................................... 2-16
Automatic Failbacks...............................................................................2-18
Manual Path Switching.................................................................................... 2-18
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Hitachi Dynamic Link Manager (for Solaris) User Guide