IBM Tivoli Storage Manager in a Clustered Environment

Chapter 8. Establishing an HACMP infrastructure on AIX 419

򐂰 System dump enhancements

򐂰 DVD support for system dumps

򐂰 snap command enhancements

Trace enhancements

These enhancements include:

򐂰 Administrative control of the user trace buffers

򐂰 Single thread trace

System management

AIX 5L provides many enhancements in the area of system management and

utilities. This section discusses these enhancements. Topics include:

򐂰 InfoCenter for AIX 5L Version 5.3

򐂰 Multiple desktop selection from BOS menus

򐂰 Erasing hard drive during BOS install

򐂰 Service Update Management Assistant

򐂰 Long user and group name support

򐂰 Dynamic reconfiguration usability

򐂰 Paging space garbage collection

򐂰 Dynamic support for large page pools

򐂰 Interim Fix Management

򐂰 List installed filesets by bundle

򐂰 Configuration file modification surveillance

򐂰 DVD backup using the mkdvd command

򐂰 NIM security

򐂰 High Available NIM (HA NIM)

򐂰 General NIM enhancements

8.2 HACMP overview

This overview contains an introduction to IBM High Availability Cluster

Multi-Processing (HACMP) for AIX product line, and the concepts on which

IBM’s high availability products are based. It is essential that the reader fully

understand how HACMP works, and what HACMP is designed to deliver with

regard to availability.

We discuss the following topics:

򐂰 What is HACMP?

򐂰 HACMP concepts

򐂰 HACMP terminology

420 IBM Tivoli Storage Manager in a Clustered Environment

8.2.1 What is HACMP?

IBM’s high availability solution for AIX, High Availability Cluster Multi Processing,

based on IBM’s well-proven clustering technology, consists of two components:

򐂰 High availability: The process of ensuring that an application is available for

use through the use of duplicated and/or shared resources

򐂰 Cluster multi-processing: Multiple applications running on the same nodes

with shared or concurrent access to the data

A high availability solution based on HACMP provides automated failure

detection, diagnosis, application recovery, and node reintegration. With an

appropriate application, HACMP can also provide concurrent access to the data

for parallel processing applications, thus offering excellent horizontal scalability.

A typical HACMP environment is shown in Figure 8-1.

Figure 8-1 HACMP cluster

HACMP Cluster

pSeries

Node

Node

A

A

pSeries

Network ethernet

Serial network

Node

Node

B

B

Resource Group

Application_01

Volume Groups

File system s

hdisk1

hdisk1

hdisk2

hdisk2

hdisk3

hdisk3

hdisk1

hdisk1

hdisk2

hdisk2

hdisk3

hdisk3

Resource Group

Application_02

Volume Groups

File systems