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hds存储操作文档for aix
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ii
Hitachi Dynamic Link Manager User’s Guide for IBM AIX Systems
Copyright © 2008 Hitachi Ltd., Hitachi Data
Systems Corporation, ALL RIGHTS RESERVED
Notice: No part of this publication may be
reproduced or transmitted in any form or by
any means, electronic or mechanical,
including photocopying and recording, or
stored in a database or retrieval system for
any purpose without the express written
permission of Hitachi Ltd., and Hitachi Data
Systems Corporation (hereinafter referred to
as “Hitachi Data Systems”).
Hitachi Ltd. and Hitachi Data Systems reserve
the right to make changes to this document
at any time without notice and assume no
responsibility for its use. Hitachi Ltd. and
Hitachi Data Systems products and services
can only be ordered under the terms and
conditions of Hitachi Data Systems’ applicable
agreements. All of the features described in
this document may not be currently available.
Refer to the most recent product
announcement or contact your local Hitachi
Data Systems sales office for information on
feature and product availability.
This document contains the most current
information available at the time of
publication. When new and/or revised
information becomes available, this entire
document will be updated and distributed to
all registered users.
Hitachi, the Hitachi logo, and Hitachi Data
Systems are registered trademarks and
service marks of Hitachi, Ltd. The Hitachi
Data Systems logo is a trademark of Hitachi,
Ltd.
IBM is a trademark of International Business
Machines Corporation in the United States,
other countries, or both.
All other brand or product names are or may
be trademarks or service marks of and are
used to identify products or services of their
respective owners.
Contents iii
Hitachi Dynamic Link Manager User’s Guide for IBM AIX Systems
Contents
Preface...................................................................................................ix
Intended Audience .............................................................................................. ix
Software Version..................................................................................................x
Release Notes......................................................................................................x
Document Revision Level ......................................................................................x
Document Organization .......................................................................................xi
Referenced Documents........................................................................................xi
Document Conventions....................................................................................... xii
Convention for Storage Capacity Values .............................................................. xiii
Getting Help ..................................................................................................... xiii
Comments........................................................................................................ xiv
Overview of Hitachi Dynamic Link Manager ............................................ 1-1
About the Hitachi Dynamic Link Manager ............................................................1-2
Major Features..................................................................................................1-4
HDLM Configuration and Operations ...................................................... 2-1
Devices Managed by HDLM ................................................................................2-2
System Configuration ........................................................................................2-3
LU Configuration ...............................................................................................2-5
HDLM Program Configuration .............................................................................2-7
HDLM Driver and hdisk ......................................................................................2-9
Load Distribution Using Load Balancing.............................................................2-10
Load Balancing Ra
nge...............................................................................2-11
Algorithms for Load Balancing ...................................................................2-13
Failover and Failback Using Pat
h Switching........................................................2-16
Automatic Path Switching
..........................................................................2-16
Manual Path Switchi
ng ..............................................................................2-21
Path Status Transit
ion...............................................................................2-21
Monitoring Intermittent Errors (Auto Failback Used)...........................................2-26
iv Contents
Hitachi Dynamic Link Manager User’s Guide for IBM AIX Systems
Checking Intermittent Errors..................................................................... 2-26
Setting up Intermittent Error Monitoring .................................................... 2-26
Actions for Intermittent Error Monitoring.................................................... 2-27
When User Operations Change the Intermittent Error Information ............... 2-30
Detecting Errors by Using Pat
h Health Checking................................................ 2-32
Error Management
.......................................................................................... 2-33
Logs Collected ......................................................................................... 2-34
Error Information Filtering ........................................................................ 2-35
Collecting Error Information Using the DLMgetras Utility ............................. 2-36
Collecting Audit Log Data ................................................................................ 2-37
Categories and Audit Events that HDLM Ca
n Output to the Audit Log ........... 2-38
Prerequisites for Outputting Audi
t Log Data ............................................... 2-40
Destination and Filtering of Audit Log Data ................................................ 2-40
Audit Log Data Form
ats............................................................................ 2-41
Cluster Support
.............................................................................................. 2-44
Creating an HDLM Environment............................................................. 3-1
HDLM System Requirements ............................................................................. 3-2
Host and OS Support for HDLM................................................................... 3-2
Storage Subsystems Supported by HDLM..................................................... 3-4
Cluster Software Supported by HDLM .......................................................... 3-5
Memory and Disk Space Requirements ........................................................ 3-6
Number of Paths Supported in HDLM........................................................... 3-8
Flow for Creating an HDLM Environment ............................................................ 3-9
Types of HDLM Installation.............................................................................. 3-10
Notes on Creating an HDLM Environment ......................................................... 3-11
Notes on Installing HDLM ......................................................................... 3-11
Notes on an Upgrade Installation or Re-installation of HDLM ....................... 3-11
Notes on the Virtual I/O Server ................................................................. 3-12
Notes on a License Ke
y ............................................................................ 3-12
Notes on Trace Files................................................................................. 3-12
Notes on Storage Subsystems
................................................................... 3-13
Notes on the Cluster
................................................................................ 3-14
Notes on the Automa
tic Failback ............................................................... 3-14
Notes on the queue_depth Parameter Val
ue for an HDLM-Managed Device .. 3-15
Installing HDLM.............................................................................................. 3-16
Available Installati
on Methods................................................................... 3-16
Preparations for a New Insta
llation of HDLM .............................................. 3-19
Performing a New Installatio
n of HDLM...................................................... 3-22
Preparations for an Upgrade Installation or Re-Installation of HDLM............. 3-31
Performing an Upgrade Installation or Re-installation of HDLM .................... 3-32
Migrating from HDLM Version 5.8.1 or Earlier to Version 5.9 or Later ........... 3-42
Installing HDLM in an HACMP Enviro
nment ................................................ 3-45
Contents v
Hitachi Dynamic Link Manager User’s Guide for IBM AIX Systems
Performing an Unattended Installation of HDLM..........................................3-48
Checking the Path Configuration.......................................................................3-56
Setting Up HDLM.............................................................................................3-57
Checking the Current Settings....................................................................3-57
Setting the HDLM Functional
ity ..................................................................3-57
Setting Load Bala
ncing..............................................................................3-58
Checking the New Settings ........................................................................3-65
Setting Up Integrated Traces ...........................................................................3-67
Displaying the Hitachi Network Objectplaza Trace Library Setup Menu ..........3-68
Changing the Size of Integrated Trace Files ................................................3-69
Changing the Number of I
ntegrated Trace Files ..........................................3-70
Changing the Buffer Size Per Monitor
ing Interval Duration ...........................3-71
Adjusting the Number of Messages to be Output Per Monitoring Interval.......3-72
Finishing the Hitachi Network Objectplaza Tr
ace Library Settings..................3-74
Applying the Hitachi Network Objectplaza Tr
ace Library Settings ..................3-74
About the Reservation Policy............................................................................3-75
Settings for Using HACMP ................................................................................3-76
Storage Subsystem Settings ......................................................................3-76
Registering theHDLM Script for HACMP.......................................................3-76
Setting the Reservation Policy....................................................................3-78
Settings for Using GPFS ...................................................................................3-79
Settings for Using Oracle RAC 10g or Oracle RAC 11g ........................................3-80
Settings for MISSCOUNT and DISKTIMEOUT...............................................3-80
Settings for Reservation Policy...................................................................3-81
Settings for Using VCS.....................................................................................3-82
Uninstalling HDLM...........................................................................................3-83
Preparations for HDLM Uninstallation .........................................................3-83
Uninstalling HDLM ....................................................................................3-83
Uninstalling the Hitachi Network Objectplaza Trace Library (HNTRLib2).........3-89
Uninstalling Hitachi Network Objectplaza Trace Library (HNTRLib) ................3-90
Canceling Cluster Software (HACMP) Settings
.............................................3-91
Operating HDLM................................................................................... 4-1
Important Notes on Using HDLM ........................................................................4-2
Displaying Path I
nformation ........................................................................4-2
When a Path Error Is Detected ....................................................................4-2
Storage Subsystem
.....................................................................................4-3
Notes on Shutting D
own a Host ...................................................................4-3
Notes on Errors in a H
ost ............................................................................4-3
Notes on Enabling Both Primary and Secondary Volumes to Be Viewed
From the Same Server..........................................................................4-4
Notes on an LVM Mirror Configuration ..........................................................4-4
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