Fault tolerant storage : multipathing and clustering solutions for open systems for the IBM ESS / Barry Mellish, Bernd Albrecht, Omar Hajime Fidelis, Maciej Struzinkski.

Format:

Book

Author/Creator:

Mellish, Barry.

Contributor:

Albrecth, Bernd.

Fidelis, Omar Hajime.

Struzinski, Maciej.

Language:

English

Subjects (All):

Parallel processing (Electronic computers).

High performance computing.

Physical Description:

1 online resource (260 p.)

Edition:

2nd ed.

Place of Publication:

San Jose, CA : IBM Redbooks, c2002.

Language Note:

English

Contents:

Front cover

Contents

Figures

Tables

Preface

The team that wrote this redbook

Special notice

IBM trademarks

Comments welcome

Chapter 1. Introduction

1.1 Introduction to the IBM Enterprise Storage System

1.1.1 The Seascape architecture

1.1.2 Enterprise Storage System overview

1.1.3 ESS Copy Services components

FlashCopy

Peer-to-Peer Remote Copy (PPRC)

1.2 Introduction to high availability concepts

1.2.1 Multipathing

What is multipathing?

When is it used?

Static and dynamic load balancing

Why you need multipathing software

1.2.2 Mirroring

What is mirroring?

Software mirroring

Hardware mirroring

Why is it used?

1.2.3 Multipathing versus mirroring

1.2.4 Clustering

What is it?

Chapter 2. Basic concepts of ESS with multipathing and clustering

2.1 Concepts of high availability

2.1.1 What is high availability?

Downtime issues

2.1.2 Single system availability

2.1.3 Increasing availability by clustering

Clustering concept basics

2.2 How disks are seen on ESS

2.2.1 Overview

2.2.2 SCSI

Targets and LUNs

SCSI host system limitations

2.2.3 Fibre Channel

Fibre Channel access modes

2.2.4 Fibre Channel Storage Area Networks (SANs)

2.3 Managing the number of paths to a LUN

2.3.1 How many paths are seen

SCSI connection

Fibre Channel connections

2.3.2 How to reduce paths

Reduce by ESS configuration

Reduce by zoning

Reduce by adapter profiles

Reduce by SAN management software

2.3.3 Paths over inter switch links

Chapter 3. Multipathing software

3.1 IBM Subsystem Device Driver

3.1.1 Path algorithms

Single-path mode

Multiple-path mode

3.1.2 How many paths to use with SDD

3.1.3 Usage of datapath command

Usage of datapath query adapter command.

Usage of datapath query adaptstats command

Usage of datapath query device command

Usage of datapath query devstats command

Usage of datapath set adapter command

Usage of datapath set device command

3.2 HP-UX LVM built-in support for Physical Volume Links

3.3 Veritas VxVM built-in Dynamic MultiPathing software (DMP)

3.3.1 Supported disk arrays

3.3.2 Path failover and load balancing

Chapter 4. Clustering concepts

4.1 What is a cluster?

4.2 The benefits of clustering

4.2.1 Why consider a cluster?

High availability

Scalability

Performance

Price/performance

Manageability

Administrative clustering

4.2.2 What is high availability?

4.2.3 Server consolidation

Logical consolidation

Physical consolidation

Re-centralization

4.3 Types of clusters

4.3.1 Software for clusters

4.3.2 Hardware for clusters

Shared disk

Shared nothing

4.3.3 Active and passive servers

Active / active

Active / passive

Hybrid

4.4 IBM cluster strategy

4.5 Linux clustering

High performance computing or scientific computing

Load balancing or scalability

High availability and failover

4.5.1 Implementing Linux clustering

4.5.2 Failover service

4.5.3 Load balancing

Direct routing

Network Address Translation

Tunneling

4.5.4 Supported services

4.5.5 Sharing the data between nodes

rsync

Network File System (NFS)

Global File System (GFS)

Intermezzo

Back-end database

4.5.6 Putting it all together

4.6 RS/6000 Cluster Technology (RSCT) overview

4.6.1 Topology Services (TS)

TS overview

4.6.2 Group Services (GS)

GS overview

4.6.3 Event Management (EM)

EM overview

Chapter 5. SDD installation and configuration on AIX

5.1 Pre-installation checks

5.2 Hardware and software requirements

5.2.1 SCSI requirements.

5.2.2 Fibre Channel requirements

5.2.3 Non supported environments

5.3 Installing and configuring Fibre Channel device drivers

5.3.1 Installing Fibre Channel device drivers

Verifying the installation

5.3.2 Gigabit Fibre Channel Adapter for PCI bus FC 6227 (type 4-S) features

5.3.3 2-Gigabit Fibre Channel Adapter for PCI bus FC 6228 (type 4-W) features

5.3.4 Problem determination

Complexity of the Fibre Channel Environment

Nature of Fibre Channel environment problems

Upgrading the Fibre Channel adapter firmware

5.4 Installing and configuring the IBM Subsystem Device Driver

5.4.1 Installing the IBM Subsystem Device Driver

Verifying the SDD Installation

Major files installed with SDD software

5.4.2 Configuring the Subsystem Device Driver

Preparing to configure the Subsystem Device Driver

Configuring the Subsystem Device Driver

Verifying the SDD configuration

Changing the path-selection policy

Adding paths to SDD devices which belongs to a volume group

5.4.3 Unconfiguring the Subsystem Device Driver devices

5.4.4 Removing the Subsystem Device Driver

5.5 Using IBM SDD on AIX host

5.5.1 Providing load-balancing and failover protection

Displaying the ESS vpath device configuration

Configuring a volume group for failover protection

Importing a volume group with SDD

Exporting a volume group with SDD

How failover protection can be lost

Recovering from mixed volume groups

Extending an existing SDD volume group

Backing-up all files belonging to a SDD volume group

Restoring all files belonging to a SDD volume group

SDD-specific SMIT panels

5.5.2 Using ESS devices directly

5.5.3 Using ESS devices through AIX LVM

5.5.4 Migrating non-SDD volume group to ESS SDD multipath volume group

5.5.5 SDD utility programs

Usage of datapath command.

5.5.6 SDD error log messages

5.6 How to use HACMP with SDD

5.6.1 Understanding the SDD support for HACMP/6000

5.6.2 What's new in SDD for HACMP/6000

5.6.3 Special requirements for HACMP/6000

How to recover paths that are lost during HACMP/6000 node failover

5.6.4 Models of the ESS supported in HACMP/6000 environment

5.7 Upgrading SDD for AIX 4.2.1, AIX 4.3.2 and AIX 4.3.3

5.7.1 Upgrading to SDD 1.3.0.x through a non-disruptive installation

5.7.2 Upgrading to SDD 1.3.0.x through a disruptive installation

5.8 Using concurrent download of licensed internal code

Chapter 6. DMP installation and configuration on Sun servers

6.1 Concepts of multipathing and clustering on Sun platform

6.2 Hardware and software requirements

6.2.1 Hardware

6.2.2 Software

6.2.3 Non supported environments

6.3 Preparing the environment

6.3.1 Installing the operating system

6.3.2 Configuring all HBAs

sd_max_throttle

sd_io_time

set maxphys

6.3.3 Emulex

automap=1

fcp-on=1

lun-queue-depth

network-on=0

topology=2

zone-rscn=1

6.3.4 JNI

fca_nport

public_loop = 0

ip_disable = 1

scsi_probe_delay = 5000

failover = 60

6.3.5 Setting up the ESS

6.3.6 Attaching an ESS to a Sun Solaris Enterprise Servers

6.4 Using the SDD

6.4.1 When to use SDD

6.4.2 Installing the Subsystem Device Driver

Post-installation

6.4.3 Uninstalling the Subsystem Device Driver

6.5 Installing and configuring Veritas Volume Manager

6.5.1 Creating a filesystem under Veritas

6.5.2 Sun Veritas and ESS logical volumes

6.5.3 ESS identification under Veritas

6.6 Installing and configuring cluster software

Chapter 7. SDD installation and configuration on HP-UX servers

7.1 Concepts of multipathing and clustering on HP-UX platform.

7.2 Hardware and software requirements

7.2.1 Hardware

7.2.2 Software

7.2.3 Non supported environments

7.3 Preparing the environment

7.3.1 Pre-installation planning

7.3.2 Installing the operating system

7.3.3 Installing and confirming HP-UX installation patches

7.3.4 Confirming correct installation of the host bus adapter

7.3.5 Setting up the ESS

7.3.6 Attaching an ESS to a Hewlett Packard 9000

7.3.7 Confirming storage connectivity

Switched fabric

Fibre Channel Arbitrated Loop

7.3.8 Tuning recommendations

7.3.9 Installing and configuring cluster software

7.4 Installing and uninstalling the SDD

7.4.1 What is PV-Link?

7.4.2 How to use PV-Links

7.4.3 PV-Link versus SDD

7.4.4 Installing SDD

Verifying the SDD Installation and preparing the vpaths

Creating Volume Groups using the SDD

Configuring the Volume Groups using the SDD

7.4.5 Uninstalling SDD

Verifying the SDD uninstallation

Chapter 8. Installing Fibre Channel and configuring multipathing on SGI IRIX 6.5

8.1 Supported configurations

Direct connection

8.2 Installation of Fibre Channel on SGI IRIX 6.5

8.2.1 Confirming IRIX installation

8.2.2 Confirming QLA2200F installation

8.2.3 Setting up ESS

Adding or modifying SGI connections

Configuring host adapter ports

Adding and assigning volumes

8.2.4 Installing optical cable

8.2.5 Confirming switch connectivity

Switched fabric only

Zoning

8.2.6 Confirming storage connectivity

Switched fabric LUN

8.3 Configuring host path failover

8.3.1 General considerations

8.3.2 Switched fabric

8.3.3 Fibre Channel Arbitrated Loop

8.3.4 Manually switch IO between the primary and alternate path

8.4 Working with ESS volumes.

8.4.1 Configuring storage.

Notes:

"April 2002."

Includes bibliographical references and index.

OCLC:

226376665