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Contents

Adminstrator's Guide 1

Chapter 1 Technical overview

Storage Foundation Cluster File System architecture

Storage Foundation Cluster File System design

Storage Foundation Cluster File System failover

Group lock manager

VxFS functionality on Cluster File Systems

Supported features

Unsupported features

Storage Foundation Cluster File System benefits and applications

Advantages to using Storage Foundation Cluster File System

When to use Storage Foundation Cluster File System

Chapter 2 Storage Foundation Cluster File System architecture

The role of component products

Veritas Cluster Server

Veritas Volume Manager cluster functionality

About Storage Foundation Cluster File System

Storage Foundation Cluster File System and the group lock manager

Asymmetric mounts

Parallel I/O

Storage Foundation Cluster File System namespace

Storage Foundation Cluster File System backup strategies

Synchronizing time on Cluster File Systems

Distributing load on a cluster

File system tuneables

Split-brain and jeopardy handling

Jeopardy state

Jeopardy handling

Recovering from jeopardy

Fencing

Single network link and reliability

Low priority link

I/O error handling policy

About Veritas Volume Manager cluster functionality

Private and shared disk groups

Activation modes of shared disk groups

Connectivity policy of shared disk groups

Limitations of shared disk groups

Chapter 3 Storage Foundation Cluster File System administration

Veritas Cluster Server overview

Veritas Cluster Server messaging—GAB

Veritas Cluster Server communication—LLT

Veritas Volume Manger cluster functionality overview

Storage Foundation Cluster File System overview

Cluster and shared mounts

Storage Foundation Cluster File System primary and Storage Foundation Cluster File System secondary

Asymmetric mounts

Storage Foundation Cluster File System and Veritas Volume Manager cluster functionality agents

Storage Foundation Cluster File System administration

Storage Foundation Cluster File System commands

Storage Foundation Cluster File System commands

mount

fsclustadm

fsadm

Running commands safely in a cluster environment

Time synchronization for Cluster File Systems

Growing a Storage Foundation Cluster File System

The fstab file

Distributing the load on a Cluster

Using GUIs

Snapshots on Storage Foundation Cluster File System

Cluster snapshot characteristics

Performance considerations

Creating a snapshot on a Storage Foundation Cluster File System

Chapter 4 Fencing administration

I/O fencing

Data disks

Coordinator Disks

Before you configure coordinator disks

Setting up the disk group for coordinator disks

Requirements for testing the coordinator disk group

Testing the coordinator disk group

Creating the vxfendg file

Adding or removing coordinator disks

Verifying fenced configurations

Registration key formatting

Disabling I/O fencing

How I/O fencing works during different events

Troubleshooting fenced configurations

Example of a preexisting network partition (Split-Brain)

Recovering from a Preexisting Network Partition (Split-Brain)

Example Scenario I

Example Scenario II

Example Scenario III

Chapter 5 Veritas Volume Manager cluster functionality administration

Overview of Cluster Volume Management

Private and shared disk Groups

Activation modes of shared disk groups

Connectivity policy of shared disk groups

Disk group failure policy

Limitations of shared disk groups

Chapter 6 Agents for Storage Foundation Cluster File System

List of Storage Foundation Cluster File System Agents

VCS Cluster Components

Resources

Attributes

Service Groups

Modifying the Agents and Their Resources

Resources and Service Groups for File System Cluster Functionality

Resource and Service Group Dependencies

Storage Foundation Cluster File System Administrative Interface

Storage Foundation Cluster File System Resource Management Commands

The cfscluster Command

The cfsmntadm Command

The cfsdgadm Command

The cfsmount/cfsumount Command

Example main.cf File

Example CVMTypes.cf File

Example CFSTypes.cf File

CFSMount Agent

Type Definition

Sample Configuration

CFSfsckd Agent

Type Definition

Sample Configuration

CVMCluster Agent

Type Definition

Sample Configuration

CVMVolDg Agent

Type Definition

Sample Configuration

Glossary 89

Index