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For example, in Figure 2-17 Path Switching in a Cluster Configuration on page
2-45, when HDLM uses a path (A) from the active host to access a device
within the LU, if the path is placed offline, HDLM switches to another path (B)
to continue processing.
The trigger for switching nodes is dependent on the cluster software.
Figure 2-17 Path Switching in a Cluster Configuration
HDLM Functions
2-45
Hitachi Dynamic Link Manager User Guide (for Windows(R))
- Dynamic Link Manager Software 1
- Contents 3
- Product version 12
- Release notes 12
- Document revision level 12
- Document organization 12
- Intended audience 12
- Referenced documents 13
- Document conventions 13
- General font conventions 14
- Getting help 16
- Comments 16
- Overview of HDLM 17
- What is HDLM? 18
- HDLM Features 19
- HDLM Functions 21
- Cluster Support 22
- Devices Managed by HDLM 23
- System Configuration 23
- Components Description 24
- LU Configuration 27
- Program Configuration 29
- Program name Functions 30
- Load Balancing Algorithms 34
- Automatic Path Switching 37
- Automatic Failbacks 38
- Manual Path Switching 39
- Path Status Transition 40
- The Offline Path Statuses 41
- Status Transitions of a Path 41
- Automatic Failback Is Used) 44
- Monitoring 47
- Dynamic Re-configuration 50
- Error Management 51
- Types of Collected Logs 52
- Table 2-8 Error Levels 54
- Collecting Audit Log Data 55
- Category Explanation 56
- Severity 58
- Message ID 58
- Correspondence with event 61
- Audit Log Data Formats 62
- Explanation 63
- HDLM System Requirements 68
- Microsoft MPIO Drivers 69
- Supported Storage systems 69
- Exchange Data 71
- OS Related programs 72
- >dlnkmgr view -sys -sfunc 77
- Memory Requirements 78
- Disk Requirements 78
- HDLM Installation Types 79
- Notes on HBAs and HBA Drivers 80
- Notes on Storage systems 80
- Notes on HDLM Versions 80
- Notes on Windows 82
- Code = -99 nnnnn 83
- Problem What to do 84
- Notes on Related Software 85
- \InstallationInformation\ 89
- Installing HDLM 90
- Installation 92
- Creating an HDLM Environment 100
- . Install MSCS on the host 104
- . Restart the host 104
- . Perform the installation 104
- When VCS Is Used 108
- When Oracle RAC Is Used 112
- In a Non-Cluster Environment 117
- When MSCS Is Used 121
- Installing JRE 131
- Setting Up HDLM 134
- Checking the Current Settings 135
- Setting Up the HDLM Functions 136
- Setting the Trace Level 141
- Setting the Trace File Size 142
- >dlnkmgr set -systfs 2000 143
- >dlnkmgr set -systfn 10 143
- Value (severity) Explanation 143
- Checking the Updated Settings 144
- Setting Up Integrated Traces 145
- Setting Default value 146
- Recommended 146
- Dialog Box 147
- Uninstalling HDLM 148
- HDLM Operation 159
- Notes on Using HDLM 160
- Using Windows Server 2008 161
- Notes on Using the HDLM GUI 162
- Viewing the GUI Help 162
- Notes on Using Commands 162
- Viewing Path Information 163
- Changing the Status of Paths 163
- Viewing LU Information 165
- Viewing License Information 168
- Updating the License 168
- Check Path Information 170
- Table 4-1 List of Counters 171
- Starting the HDLM Manager 172
- HDLM Resident Processes 173
- When MSCS is not used 174
- When MSCS is used 175
- Checking an Added Path 176
- Deleting an LU Dynamically 177
- Item Description 179
- Troubleshooting 181
- What To Do for a Path Error 184
- Examining the Messages 185
- Obtaining Path Information 185
- Identifying the Error Path 186
- Placing the Path Online 186
- Obtaining Program Information 187
- What To Do for Other Errors 188
- Command Reference 189
- Command format 190
- Parameters 191
- Parameter 192
- Reference 197
- To Place Paths Online 198
- Value Description 205
- >dlnkmgr set -ellv 1 205
- Table 6-4 Trace Level Values 206
- Table 6-6 License Key Types 214
- Examples 223
- Information 225
- Displayed path information 234
- Parameter and Sub-parameters 243
- Displayed LU information 247
- Utility Reference 255
- Overview of the Utilities 256
- Collecting Error Information 258
- Folder that stores collected 259
- Files Explanation 259
- Reservation Key 266
- HDLM installation folder 270
- Version of the installed HDLM 270
- About the Log File 279
- Messages 283
- Format Meaning 285
- Terms Meaning 285
- KAPL01001 to KAPL02000 286
- KAPL02001 to KAPL03000 307
- KAPL03001 to KAPL04000 320
- KAPL04001 to KAPL05000 323
- KAPL05001 to KAPL06000 330
- KAPL07001 to KAPL08000 334
- KAPL08001 to KAPL09000 336
- KAPL09001 to KAPL10000 339
- KAPL10001 to KAPL11000 362
- KAPL11001 to KAPL12000 371
- KAPL12001 to KAPL13000 373
- KAPL13001 to KAPL14000 381
- KAPL15001 to KAPL16000 384
- Component 387
- Message ID Explanation 388
- Versions of HDLM 395
- Differences in Default Values 396
- Offline(E) Status 399
- Environment 401
- Acronyms and abbreviations 403
- Acronyms-2 404
- Acronyms-3 405
- Acronyms-4 406
- Acronyms-5 407
- Acronyms-6 408
- Glossary 409
- Glossary-2 410
- Glossary-3 411
- Glossary-4 412
- Glossary-5 413
- Glossary-6 414
- MK-92DLM129-21 422
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