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Contents


About This Guide

Chapter 1: HACMP for AIX

High Availability Cluster Multi-Processing for AIX   

HACMP and HACMP/ES   

High Availability and Hardware Availability   

High Availability vs. Fault Tolerance   

Role of HACMP   

Cluster Multi-Processing    

The Availability Costs and Benefits Continuum   

Enhancing Availability with the AIX 5L Software   

Journaled File System and Enhanced Journaled File System   

Disk Mirroring   

Process Control   

Error Notification   

Physical Components of an HACMP Cluster    

Nodes    

Shared External Disk Devices    

Networks    

Clients    

Goal of HACMP: Eliminating Scheduled Downtime   

Chapter 2: HACMP Cluster Nodes, Sites, Networks, and Heartbeating

Cluster Nodes and Cluster Sites   

Nodes   

Sites   

Cluster Networks   

Physical and Logical Networks   

HACMP Communication Interfaces   

HACMP Communication Devices   

Subnet Routing Requirements in HACMP   

Service IP Label/Address   

IP Alias   

IP Address Takeover   

IPAT and Service IP Labels   

IP Address Takeover via IP Aliases   

IP Address Takeover via IP Replacement   

Heartbeating over Networks and Disks   

Heartbeating in HACMP: Overview   

Heartbeating over TCP/IP Networks   

Heartbeating over Point-to-Point Networks   

Heartbeating over Disks   

Chapter 3: HACMP Resources and Resource Groups

Cluster Resources: Identifying and Keeping Available   

Identifying Cluster Resources   

Types of Cluster Resources   

Volume Groups   

Logical Volumes   

Filesystems   

Applications   

Service IP Labels/Addresses   

Tape Resources   

Communication Links   

Cluster Resource Groups   

Participating Nodelist   

Default Node Priority   

Home Node   

Startup, Fallover and Fallback    

Resource Group Policies and Attributes   

Overview   

Resource Group Startup, Fallover and Fallback   

Settling Time, Dynamic Node Priority and Fallback Timer   

Distribution Policy   

Cluster Networks and Resource Groups   

Resource Group Dependencies   

Child and Parent Resource Groups Dependencies   

Resource Group Location Dependencies   

Sites and Resource Groups   

Chapter 4: HACMP Cluster Hardware and Software

Enhancing Availability with IBM Hardware   

IBM pSeries   

RS/6000 SP System   

Disk Subsystems   

HACMP Required and Supported Hardware   

HACMP Cluster Software   

Software Components of an HACMP Node   

HACMP Software Components   

Complementary Cluster Software   

Chapter 5: Ensuring Application Availability

Overview   

Eliminating Single Points of Failure in an HACMP Cluster   

Potential Single Points of Failure in an HACMP Cluster   

Eliminating Nodes as a Single Point of Failure    

Eliminating Applications as a Single Point of Failure    

Eliminating Communication Interfaces as a Single Point of Failure   

Eliminating Networks as a Single Point of Failure    

Eliminating Disks and Disk Adapters as a Single Point of Failure   

Minimizing Scheduled Downtime with HACMP    

Starting Cluster Services without Stopping Applications   

Dynamic Automatic Reconfiguration (DARE)   

Resource Group Management   

Cluster Single Point of Control (C-SPOC)   

Dynamic Adapter Swap   

Automatic Verification and Synchronization   

Minimizing Unscheduled Downtime   

Recovering Resource Groups on Node Startup   

Fast Recovery   

Delayed Fallback Timer for Resource Groups   

Minimizing Takeover Time: Fast Disk Takeover   

Maximizing Disaster Recovery   

Cross-Site LVM Mirroring   

Cluster Events   

Processing Cluster Events    

Emulating Cluster Events   

Customizing Event Processing   

Customizing Event Duration   

Chapter 6: HACMP Cluster Configurations

Sample Cluster Configurations   

Standby Configurations   

Standby Configurations: Example 1   

Standby Configurations: Example 2   

Takeover Configurations    

One-Sided Takeover   

Mutual Takeover    

Two-Node Mutual Takeover Configuration for Concurrent Access   

Eight-Node Mutual Takeover Configuration for Concurrent Access   

Cluster Configurations with Multi-Tiered Applications   

Cluster Configurations with Resource Group Location Dependencies   

Publishing Model with Same Node and Different Nodes Dependencies   

Cross-Site LVM Mirror Configurations for Disaster Recovery   

Cluster Configurations with Dynamic LPARs   

DLPARs and Capacity Upgrade on Demand   

Chapter 7: HACMP Configuration Process and Facilities

Information You Provide to HACMP   

Information on Physical Configuration of a Cluster   

AIX 5L Configuration Information   

Establishing the Initial Communication Path   

Information Discovered by HACMP   

Cluster Configuration Options: Standard and Extended   

Configuring an HACMP Cluster Using the Standard Configuration Path   

Configuring an HACMP Cluster Using the Extended Configuration Path   

Overview: HACMP Administrative Facilities   

Cluster Security   

Installation, Configuration and Management Tools   

Two-Node Cluster Configuration Assistant   

Smart Assists for Integrating Specific Applications with HACMP   

General Application Smart Assist   

Smart Assist API   

Planning Worksheets   

Starting, Stopping and Restarting Cluster Services   

SMIT Interface   

Web-Based SMIT Interface   

HACMP System Management with C-SPOC   

Cluster Snapshot Utility   

Customized Event Processing   

Resource Group Management Utility   

HACMP File Collection Management   

Monitoring Tools   

Cluster Manager   

Cluster Information Program   

Application Monitoring   

Show Cluster Applications SMIT Option   

Cluster Status Utility (clstat)   

HAView Cluster Monitoring Utility    

Cluster Monitoring and Administration with Tivoli Framework   

Application Availability Analysis Tool   

Persistent Node IP Labels   

HACMP Verification and Synchronization   

Troubleshooting Tools   

Log Files    

Resetting HACMP Tunable Values   

Cluster Status Information File   

Automatic Error Notification   

Custom Remote Notification   

User-Defined Events   

Event Preambles and Summaries   

Trace Facility   

Cluster Test Tool   

Emulation Tools   

HACMP Event Emulator   

Emulation of Error Log Driven Events   

Chapter 8: HACMP 5.4: Summary of Changes

List of New Features   

New Features That Enhance Ease of Use   

New Features That Enhance Geographic Distance Capability   

Other Features   

Discontinued Features   

Features Discontinued in HACMP 5.2 and Up   

Features Discontinued in HACMP 5.3   

Where You Go from Here   


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