Contents
Preface
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ix
Intended audience
.....................................................................................................
x
Product version
..........................................................................................................
x
Release notes
............................................................................................................
x
Document revision level
..............................................................................................
x
Document organization
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x
Referenced documents
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xi
Document conventions
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xi
Convention for storage capacity values
......................................................................
xiii
Getting help
............................................................................................................
xiii
Comments
..............................................................................................................
xiv
1 Overview of HDLM
................................................................................
1-1
What is HDLM?
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1-2
HDLM Features
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1-3
2 HDLM Functions
...................................................................................
2-1
Devices Managed by HDLM
......................................................................................
2-2
System Configuration
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2-2
LU Configuration
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2-3
Program Configuration
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2-4
HDLM driver and NMP positions
...............................................................................
2-5
Distributing a Load Using Load Balancing
..................................................................
2-6
Paths to Which Load Balancing Is Applied
...........................................................
2-8
When Using the Hitachi AMS/WMS Series
..................................................
2-8
When Using the Universal Storage Platform V/VM, Virtual Storage Platform,
Hitachi AMS2000 Series, or Hitachi SMS
....................................................
2-9
Load Balancing Algorithms
................................................................................
2-9
Performing Failovers and Failbacks Using Path Switching
.........................................
2-11
Automatic Path Switching
................................................................................
2-11
Automatic Failovers
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2-11
Automatic Failbacks
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2-13
Manual Path Switching
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2-13
Path Status Transition
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2-14
The Online Path Statuses
.......................................................................
2-14
iii
Hitachi Dynamic Link Manager User Guide (for VMware(R))