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Configuring OPS Clusters with MC/LockManager:

Chapter 3 Understanding MC/LockManager Software Components

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Table of Contents

MC/LockManager Architecture

How the Cluster Manager Works

Configuration of the Cluster
Heartbeat Messages
Automatic Cluster Restart
Dynamic Cluster Re-formation
Cluster Quorum for Re-formation
Use of the Cluster Lock
Single Cluster Lock
Dual Cluster Lock
No Cluster Lock
Backing Up Cluster Lock Information

How the Distributed Lock Manager Works

DLM Configuration Files (OPS 7.3.x)

How the Group Membership Service Works (OPS 8.0.5)

How the Package Manager Works

Deciding When and Where to Run and Halt Packages
Startup Policies
Automatic Rotating Standby
Automatic Failback
Running Application Services
Service Monitor
Using the Event Monitoring Service
Using the EMS HA Monitors
Stopping the Package

How the Network Manager Works

Stationary and Relocatable IP Addresses
Adding and Deleting Relocatable IP Addresses
Monitoring LAN Interfaces and Detecting Failure

Responses to Failures

Transfer of Control (TOC) When a Node Fails
Responses to Hardware Failures
Responses to Package and Service Failures
Service Restarts
Network Communication Failure

This chapter gives a broad overview of how the MC/LockManager software components work. The following topics are presented:

MC/LockManager Architecture
How the Cluster Manager Works
How the Distributed Lock Manager Works (OPS 7.3.x)
How the Group Membership Service Works (OPS 8.0.5)
How the Package Manager Works
How the Network Manager Works
Responses to Failures

If you are ready to start setting up OPS clusters, skip ahead to the "Planning" chapter.

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