Hitachi Dynamic Link Manager Software Users Guide for Linux (6.6) (HIT5203-96005, November 2011)

Contents

Preface.................................................................................................xiii

Intended audience...................................................................................................xiv

Product version.......................................................................................................xiv

Release notes..........................................................................................................xiv

Document revision level...........................................................................................xiv

Document organization............................................................................................xiv

Referenced documents.............................................................................................xv

Document conventions.............................................................................................xvi

Convention for storage capacity values.....................................................................xvii

Getting help...........................................................................................................xviii

Comments.............................................................................................................xviii

1 Overview of HDLM................................................................................1-

What is HDLM?.......................................................................................................1-2

HDLM Features.......................................................................................................1-3

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...............................................................2-4

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................................................................2-13

Paths To Which Load Balancing Is Applied........................................................2-15

When Using the Thunder 9500V Series, or Hitachi AMS/WMS series..........2-15

When Using the Lightning 9900 Series, Lightning 9900V Series, Hitachi USP,

Universal Storage Platform V/VM, Virtual Storage Platform, Hitachi AMS2000

Series, or Hitachi SMS............................................................................2-16

Load Balancing Algorithms...............................................................................2-16

Performing Failovers and Failbacks Using Path Switching.........................................2-18

Automatic Path Switching................................................................................2-19

Automatic Failovers...............................................................................2-19

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Hitachi Dynamic Link Manager User Guide (for Linux(R))