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1
Overview of HDLM
HDLM is a software package that manages paths between a host and a
storage system. HDLM is designed to distribute loads across multiple paths
and will switch a given load to another path if there is a failure in the path
that is currently being used, thus improving system reliability.
This chapter gives an overview of HDLM and describes its features.
□
What is HDLM?
□
HDLM Features
Overview of HDLM
1-1
Hitachi Dynamic Link Manager (for Windows®) User Guide
- Dynamic Link Manager 1
- Contents 3
- Document revision level 12
- Intended audience 12
- Product version 12
- Release notes 12
- Document conventions 14
- Getting help 15
- Comments 16
- Overview of HDLM 17
- What is HDLM? 18
- HDLM Features 18
- HDLM Functions 21
- Devices Managed by HDLM 23
- System Configuration 23
- Components Description 24
- LU Configuration 27
- Program Configuration 29
- Program name Functions 30
- Load Balancing Algorithms 35
- Automatic Path Switching 37
- Figure 2-10 Path Switching 38
- Manual Path Switching 39
- Path Status Transition 40
- The Online Path Statuses 41
- The Offline Path Statuses 42
- Status Transitions of a Path 42
- Automatic Failback Is Used) 46
- Monitoring 48
- Function 52
- Dynamic Re-configuration 53
- Error Management 53
- Types of Collected Logs 54
- Table 2-8 Error Levels 56
- Collecting Audit Log Data 57
- Category Explanation 58
- Severity 60
- Message ID 60
- Correspondence with event 63
- Audit Log Data Formats 64
- Cluster Support 66
- HDLM System Requirements 70
- Microsoft MPIO Drivers 71
- Supported Storage systems 71
- Exchange Data 74
- Y: Usable 79
- OS Related programs 80
- Memory Requirements 81
- Disk Requirements 81
- HDLM Installation Types 82
- Notes on HBAs and HBA Drivers 83
- Notes on Storage systems 83
- Notes on HDLM Versions 84
- Notes on Windows 85
- Code = -99 nnnnn 86
- Problem What to do 87
- Notes on Related Software 88
- Storage system type 90
- MISSCOUNT 90
- \InstallationInformation\ 92
- Installing HDLM 94
- Installation 96
- In a Non-Cluster Environment 97
- When MSCS Is Used 102
- Creating an HDLM Environment 103
- When VCS Is Used 111
- . Perform the installation 112
- When Oracle RAC Is Used 115
- Windows Server 2012 120
- . Install MSCS on the host 129
- . Restart the host 129
- PROMPT>dlnkmgr view -sys 131
- Installing JRE 135
- Setting Up HDLM 139
- Setting Up the HDLM Functions 140
- Setting Up Load Balancing 141
- Setting the Trace Level 145
- Value Description 146
- Setting the Trace File Size 147
- Value (severity) Explanation 148
- Value Explanation 148
- Setting Up Integrated Traces 149
- Settings 150
- Dialog Box 151
- Removing HDLM 152
- HDLM Operation 163
- Notes on Using HDLM 164
- Notes on Using the HDLM GUI 166
- Viewing the GUI Help 166
- Notes on Using Commands 166
- Viewing Path Information 167
- Changing the Status of Paths 167
- Viewing LU Information 169
- Viewing License Information 172
- Updating the License 172
- Check Path Information 175
- Counter name Description 176
- Selectable items 176
- Description 176
- Starting the HDLM Manager 177
- Stopping the HDLM Manager 177
- HDLM Resident Processes 178
- When MSCS is used 179
- Checking an Added Path 180
- Deleting an LU Dynamically 181
- Item Description 183
- Troubleshooting 185
- What To Do for a Path Error 188
- Examining the Messages 189
- Obtaining Path Information 189
- Identifying the Error Path 190
- Placing the Path Online 190
- Obtaining Program Information 191
- What To Do for Other Errors 192
- Command Reference 193
- Command format 194
- Parameters 195
- Parameter 196
- Examples 197
- Reference 202
- Table 6-4 Trace Level Values 212
- Table 6-6 License Key Types 219
- Information 234
- Displayed path information 243
- -lu -item 254
- Parameter and Sub-parameters 255
- Displayed LU information 260
- Utility Reference 271
- Overview of the Utilities 272
- Collecting Error Information 274
- Folder that stores collected 275
- Files Explanation 275
- Reservation Key 283
- HDLM installation folder 287
- Version of the installed HDLM 287
- About the Log File 297
- Messages 299
- Format Meaning 301
- Terms Meaning 301
- KAPL01001 to KAPL02000 302
- KAPL02001 to KAPL03000 328
- KAPL03001 to KAPL04000 342
- KAPL04001 to KAPL05000 344
- KAPL05001 to KAPL06000 352
- KAPL07001 to KAPL08000 356
- KAPL08001 to KAPL09000 358
- KAPL09001 to KAPL10000 362
- KAPL10001 to KAPL11000 385
- KAPL11001 to KAPL12000 393
- KAPL12001 to KAPL13000 396
- KAPL13001 to KAPL14000 404
- KAPL15001 to KAPL16000 407
- Component 410
- Explanation 411
- The following table lists 415
- Versions of HDLM 417
- Differences in Default Values 418
- Offline(E) Status 421
- Environment 423
- Acronyms and abbreviations 425
- Acronyms-2 426
- Acronyms-3 427
- Acronyms-4 428
- Acronyms-5 429
- Acronyms-6 430
- Glossary 431
- Glossary-2 432
- Glossary-3 433
- Glossary-4 434
- Glossary-5 435
- Glossary-6 436
- Glossary-7 437
- Glossary-8 438
- MK-92DLM129-29 446
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