Installation guide

Table of Contents

1 Executive Summary...............................................................................................................7

1.1 Introduction....................................................................................................................7

1.2 Audience........................................................................................................................8

1.3 Acronyms.......................................................................................................................8

1.4 Reference Documentation.............................................................................................9

1.5 SAP Overview..............................................................................................................10

1.6 Cluster Technology Overview......................................................................................11

2 Testbed Environment..........................................................................................................11

3 Hardware Requirements......................................................................................................12

3.1 Shared Storage Requirements.....................................................................................12

3.2 Server Hardware Requirements...................................................................................12

3.3 Network Requirements.................................................................................................13

4 Red Hat Cluster Basics.......................................................................................................13

4.1 OpenAIS.......................................................................................................................13

4.2 CMAN...........................................................................................................................13

4.3 Quorum........................................................................................................................13

4.4 Qdisk............................................................................................................................14

Additional heuristics........................................................................................................15

4.5 GFS..............................................................................................................................15

4.6 DLM..............................................................................................................................16

4.7 Fencing........................................................................................................................16

4.7.1 Power Fencing Systems.......................................................................................16

4.7.2 SAN Based Fencing..............................................................................................16

4.7.3 SCSI Fencing .......................................................................................................16

4.8 CLVM...........................................................................................................................17

4.9 Storage Mirroring.........................................................................................................17

4.10 Cluster Resource Manager........................................................................................18

4.11 Shared Root Cluster...................................................................................................18

4.12 Scalability...................................................................................................................18

4.13 Availability..................................................................................................................18

4.14 Management..............................................................................................................18

5 Operating System Installation..............................................................................................19

5.1 OS Customizations......................................................................................................19

5.1.1 NTP.......................................................................................................................19