Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 5.1 Instrukcja Użytkownika Pobierz pdf (Strona 4)

Introduction to Linux Clustering

1 Introduction

One of the oldest problems of computing is designing failure proof computing systems. Over the

years, many different methods have been developed.

Many of these you will be familiar with, including:

● Spare hardware – typically enough to mirror the production hardware.

● Fault tolerant hardware by using a number of spare components.

● Software failover features built into individual programs.

Hardware solutions are typically expensive (and not always 100% reliant). Application-specific

failover methods can often add maintenance hassles as well as doing nothing to fix the problem that

some of your programs may have no failover capabilities at all.

In recent years, a few new options have become available - in particular Linux clustering and

virtualization.

This document presents the key factors in implementing effective Linux clusters and design. Please

note the following:

● Clustering is a relatively new topic to me, and I have not had a lot of experience deploying

and maintaining clusters.

This document is the results of my research into the options available and looks at what

solutions could be developed. If you have experience with clusters and have found

technologies that do or do-not work well in practice, please supply me with feedback so I

can extend this document and make it more useful.

● This document mentions Redhat Cluster Manager a bit, but doesn't go into details about the

other major option, Linux-HA. However, most of the concepts and terminology is applicable

for both solutions.

● This document does not cover the technical details on configuring clusters, it is more of a

high level design view.

This document will also cover the use of clustering together with Xen virtualization for maximum

advantage.

The aim of this document is to provide you with an understanding of cluster solutions so that you

are empowered to identify applicable technologies and decide on the best approach to use them.

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Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 5.1 Instrukcja Użytkownika Strona 4