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Cluster Planning 33
When a failed node reintegrates into the cluster, it takes back the resource
group for which it has the highest priority. Therefore, even in this
configuration, there is a break in service during reintegration. Of course, if
you look at it from the point of view of performance, this is the best thing to
do, since you have one node doing the work of two when any one of the
nodes is down.
Third-Party Takeover Configuration
Figure 4 illustrates a three node cluster in a third-party takeover
configuration.
Figure 4. Third-Party Takeover Configuration
This configuration can avoid the performance degradation that results from a
failover in the mutual takeover configuration.
- IBM Certification Study Guide 1
- AIX HACMP 1
- May 1999 3
- Contents 5
- © Copyright IBM Corp. 1999 ix 11
- © Copyright IBM Corp. 1999 xi 13
- Comments Welcome 17
- © Copyright IBM Corp. 1999 1 19
- Section 1 - Preinstallation 20
- Certification Overview 3 21
- Certification Overview 5 23
- Chapter 2. Cluster Planning 25
- Cluster Planning 9 27
- 2.2 Cluster Networks 29
- 2.2.1 TCP/IP Networks 29
- Cluster Planning 13 31
- 2.2.2 Non-TCPIP Networks 32
- 2.3 Cluster Disks 34
- 2.3.1 SSA Disks 34
- Cluster Planning 17 35
- Table 8. SSA Disks 37
- Table 9. SSA Adapters 37
- Cluster Planning 21 39
- RAID Technology 40
- RAID Level 0 40
- RAID Level 1 40
- RAID Levels 2 and 3 41
- RAID Level 4 41
- RAID Level 5 41
- Cluster Planning 25 43
- 2.3.2 SCSI Disks 44
- Dual Active 45
- 2.4 Resource Planning 46
- 2.4.1 Resource Group Options 46
- Inactive Takeover 47
- 2.4.2 Shared LVM Components 48
- Cluster Planning 31 49
- Mutual Takeover Configuration 50
- Cluster Planning 33 51
- 2.4.3 IP Address Takeover 52
- Single Network 53
- Dual Network 54
- Point-to-Point Connection 54
- Network Name 55
- Network Attribute 55
- Adapter Label 56
- Adapter Function 56
- Cluster Planning 39 57
- file and, if 58
- 2.5 Application Planning 59
- HACMP for 60
- HACMP for AIX Planning Guide 60
- 2.5.3 Licensing Methods 61
- 2.6 Customization Planning 62
- 2.6.1 Event Customization 62
- 2.6.2 Error Notification 63
- <en_method> 65
- 2.7 User ID Planning 66
- 2.7.2 Cluster Passwords 67
- 3.1 Cluster Node Setup 69
- 3.1.1 Adapter Slot Placement 69
- 3.1.2 Rootvg Mirroring 69
- 3.1.3 AIX Prerequisite LPPs 73
- 3.1.4 AIX Parameter Settings 74
- 3.2.1 TCP/IP Networks 78
- 3.2.2 Non TCP/IP Networks 81
- 3.3 Cluster Disk Setup 84
- 3.3.1 SSA 84
- Adapter Router 85
- Adapter Definitions 86
- Disk Definitions 86
- Diagnostics 87
- Upgrade Instructions 88
- 3.3.2 SCSI 90
- SCSI Adapters 91
- RAID Enclosures 91
- # chdev -l scsi1 -a id=6 -P 98
- # chdev -l ascsi1 -a id=6 -P 99
- 3.4.1 Creating Shared VGs 100
- Subsystems 101
- Table 16. smit crjfs Options 102
- 3.4.3 Mirroring Strategies 104
- Table 18. smit crjfs Options 105
- 3.4.5 Quorum 106
- Quorum Disabled 107
- Quorum Enabled 107
- Forcing a Varyon 108
- 4.1 Installing HACMP 111
- 4.1.1 First Time Installs 111
- Check Upgraded Configuration 116
- Client-only Migration 117
- 4.2.1 Defining the Cluster 119
- 4.2.2 Defining Nodes 119
- 4.2.3 Defining Adapters 120
- HACMP Installation Guide 121
- HACMP for AIX 122
- Version 4.3:Planning Guide 122
- HACMP for AIX, Version 4.3: 123
- Administration Guide 123
- Fibrillate Count 124
- Table 19 125
- 4.3 Defining Resources 126
- 4.4 Initial Testing 129
- 4.4.1 Clverify 129
- 4.4.2 Initial Startup 130
- 4.5 Cluster Snapshot 131
- 5.1 Event Customization 135
- Cluster Customization 119 137
- Cluster Customization 121 139
- 5.1.3 Event Notification 140
- 5.1.6 Event Emulator 141
- 5.2 Error Notification 141
- Fast, Normal 142
- 5.4 NFS considerations 143
- 5.4.3 NFS Mounting 144
- /bfs locally mounted 145
- /bfs nfs-exported 145
- /afs locally mounted 145
- /afs nfs-exported 145
- Chapter 6. Cluster Testing 149
- 6.1.2 System Parameters 150
- 6.1.3 Process State 150
- 6.1.4 Network State 150
- 6.1.5 LVM State 151
- 6.1.6 Cluster State 151
- 6.2 Simulate Errors 152
- 6.2.1 Adapter Failure 152
- Cluster Testing 135 153
- Cluster Testing 137 155
- 6.2.3 Network Failure 156
- 6.2.4 Disk Failure 157
- 6.2.5 Application Failure 159
- /var/adm/cluster.log 161
- /tmp/hacmp.out 161
- 7.2 config_too_long 162
- 7.3 Deadman Switch 163
- Cluster Troubleshooting 147 165
- 7.5 The DGSP Message 166
- ) is sent 166
- 7.6 User ID Problems 167
- 7.7 Troubleshooting Strategy 167
- 8.1 Monitoring the Cluster 169
- 8.1.1 The clstat Command 170
- 8.1.3 Cluster Log Files 171
- file resides on the 172
- 8.2.1 HACMP Daemons 173
- Start Cluster Services SMIT 174
- # Bring up Cluster 175
- 8.3.1 Nodes 178
- 8.3.2 Adapters 178
- 8.3.3 Disks 179
- 8.4.1 Manual Update 181
- 8.4.2 Lazy Update 182
- 8.4.3 C-SPOC 183
- 8.4.4 TaskGuide 185
- Concepts and Facilities 186
- Sticky Resource Migration 188
- Non-Sticky Resource Migration 188
- Node Name 189
- Default Location 189
- Stop Location 190
- Stopping Resource Groups 191
- System A System B 193
- 8.7 Backup Strategies 194
- 8.7.1 Split-Mirror Backups 194
- 8.8 User Management 196
- 8.8.6 C-SPOC Log 199
- 9.1.1 Hardware Requirements 201
- 9.1.2 Software Requirements 202
- 9.1.5 HACWS Configuration 203
- 9.1.6 Setup and Test HACWS 204
- 9.2 Kerberos Security 205
- Kerberos 206
- 9.3 VSDs - RVSDs 208
- Managing Shared Disks 209
- Undefined 210
- Suspended 210
- Fast IP Network 211
- 9.4.2 Eprimary Management 214
- 9.4.3 Switch Failures 214
- 10.1 HACMP for AIX Classic 217
- /.rhosts remote command 219
- 10.5 Decision Criteria 220
- Enhanced Scalability 221
- Appendix A. Special Notices 223
- Special Notices 207 225
- B.2 Redbooks on CD-ROMs 227
- B.3 Other Publications 228
- How to Get ITSO Redbooks 229
- IBM Redbook Order Form 231
- List of Abbreviations 233
- ITSO Redbook Evaluation 239
- Printed in the U.S.A 240
- SG24-5131-00 240
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