Hp Hitachi Dynamic Link Manager Software Manual do Utilizador descarregar pdf (Página 15)

Contents

Preface i

Intended readers .........................................................................................................i

Organization of this manual .......................................................................................i

Related Publications..................................................................................................ii

Conventions: Abbreviations.................................................................................... iii

Conventions: Diagrams ...........................................................................................vii

Conventions: Fonts and symbols.............................................................................vii

Conventions: KB, MB, GB, and TB ........................................................................ix

1. Overview of HDLM 1

1.1 What is HDLM? .........................................................................................................2

1.2 HDLM Features..........................................................................................................4

2. HDLM Functions 5

2.1 Devices Managed by HDLM......................................................................................6

2.2 System Configuration.................................................................................................7

2.3 LU Configuration .......................................................................................................9

2.4 Program Configuration.............................................................................................11

2.5 Position of the HDLM Driver and HDLM Device...................................................13

2.6 Logical Device Files for HDLM Devices.................................................................14

2.7 Distributing a Load Using Load Balancing..............................................................16

2.7.1 Paths to Which Load Balancing Is Applied ..................................................18

2.7.2 Load Balancing Algorithms ..........................................................................20

2.8 Performing Failovers and Failbacks Using Path Switching .....................................23

2.8.1 Automatic Path Switching.............................................................................23

2.8.2 Manual Path Switching .................................................................................26

2.8.3 Path Status Transition....................................................................................27

2.9 Intermittent Error Monitoring (Functionality When Automatic Failback Is Used) .30

2.9.1 Checking Intermittent Errors.........................................................................30

2.9.2 Setting Up Intermittent Error Monitoring .....................................................30

2.9.3 Intermittent Error Monitoring Actions..........................................................31

2.9.4 When a User Changes the Intermittent Error Information...........................33

2.10 Detecting Errors by Using Path Health Checking..................................................36

2.11 Error Management..................................................................................................37

2.11.1 Types of Collected Logs..............................................................................39

2.11.2 Filtering of Error Information .....................................................................40

2.11.3 Collecting Error Information Using the Utility for Collecting HDLM Error

Information (DLMgetras) .............................................................................41

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