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Hodnocené. / 5. Na základě hodnocení zákazníků
Chapter 1. Introduction 5
When a FlashCopy operation is invoked, it takes only a few seconds to complete the process
of establishing the FlashCopy pair and creating the necessary control bitmaps. Thereafter,
you have access to a Point-in-Time Copy of the source volume. As soon as the pair has been
established, you can read and write to both the source and target volumes.
After creating the bitmap, a background process begins to copy the real data from the source
to the target volumes. If you access the source or the target volumes during the background
copy, FlashCopy manages these I/O requests, and facilitates both reading from and writing to
both the source and target copies. When all the data has been copied to the target, the
FlashCopy relationship is ended.
1.1.2 Remote Mirror and Copy RMC (formerly Peer-to-Peer Remote Copy)
The Remote Mirror and Copy (RMC) license authorization enables several Copy Services
functions depending on the configuration and settings you use. RMC is a flexible data
mirroring technology that allows replication between volumes on two or more disk storage
systems. You can also use this feature for data backup and Disaster Recovery.
Remote Mirror and Copy is an optional function. To use it, you must purchase the Remote
Mirror and Copy function authorization code #5300 RMC for the required DS6800 storage
server machine type 1750.
DS6000 Storage Units can participate in Remote Mirror and Copy solutions with another
DS6000, or with the ESS Model 750, ESS Model 800, and DS8000 Storage Units. To
establish an RMC (formerly PPRC) relationship between the DS6000 and the ESS, the ESS
needs to have licensed internal code (LIC) Version 2.4.3.65 or later.
The Remote Mirror and Copy feature can operate in the following modes:
Metro Mirror (formerly Synchronous PPRC)
Metro Mirror provides real-time mirroring of logical volumes between two DS6000s that you
can place up to 300 km from each other. It is a synchronous copy solution where write
operations are completed on both copies (local and remote site) before they are considered
to be complete.
Global Copy (formerly PPRC-XD)
Global Copy copies data non-synchronously and over longer distances than is possible with
Metro Mirror. When operating in Global Copy mode, the source volume sends a periodic,
incremental copy of updated tracks to the target volume, instead of sending a constant
stream of updates. This causes less impact to application writes for source volumes and less
demand for bandwidth resources, while allowing a more flexible use of available bandwidth.
Global Copy does not keep the sequence of write operations. Therefore, the copy is normally
fuzzy, but you can make a consistent copy through synchronization (called a go-to-sync
operation). After the synchronization, you can issue FlashCopy at the secondary site to make
the backup copy with data consistency. After the establishment of the FlashCopy, you can
change the mode back to non-synchronous mode.
If you want to make a consistent copy with FlashCopy, you must purchase a Point-in-Time
Copy function authorization license for the secondary Storage Unit.
Note: When you change from synchronous to non-synchronous mode, you must suspend
first, and then change mode to non-synchronous mode.
- IBM System Storage DS6000 1
- Series: Copy Services with 1
- IBM System z 1
- December 2006 3
- Third Edition (December 2006) 4
- Contents 5
- Contents v 7
- Contents vii 9
- Contents ix 11
- Contents xi 13
- Contents xiii 15
- Trademarks 18
- Acknowledgements 21
- Become a published author 22
- Comments welcome 22
- Summary of changes 23
- Overview 25
- Introduction 27
- Point-in-Time Copy and 28
- Chapter 1. Introduction 5 29
- Copy Services architecture 31
- DS6000 SFI 32
- DS8000 SFI 33
- Storage 34
- Complex 1 34
- Complex 2 34
- DS8000 management structure 35
- Client 1 36
- Client 2 36
- Interfaces 39
- 3.2 Installation modes 42
- http://10.0.0.1, you will 43
- 10.0.0.1 46
- Management 47
- 10.0.0.100 48
- DS Command-Line Interface 49
- 4.3 User accounts 51
- 4.4 DS CLI profile 52
- 4.5 Command structure 53
- 4.6 Copy Services commands 53
- Table 4-3 Creation commands 54
- Table 4-4 Deletion commands 54
- Table 4-5 Options commands 54
- 4.7.1 Single-shot mode 55
- 4.7.2 Script command mode 56
- 4.7.3 Interactive mode 56
- 4.8 Return codes 57
- 4.9 User assistance 58
- 4.10 Usage examples 59
- System z interfaces 61
- 5.1 System z interfaces 62
- 5.2 TSO 62
- 5.3 ICKDSF 63
- 5.4 DFSMSdss 63
- 5.5 The ANTRQST macro 63
- 5.6 z/TPF commands 63
- FlashCopy overview 67
- 6.1 Operational environments 68
- 6.2 Terminology 69
- 6.3 Basic concepts 69
- Writing to the source and 70
- Writing to the target 71
- 6.3.1 Full volume copy 72
- 6.3.2 Nocopy option 72
- FlashCopy options 77
- 7.5 Remote FlashCopy 83
- 7.6 Persistent FlashCopy 83
- 7.7 Data set FlashCopy 83
- 7.8 Reverse restore 84
- 7.9 Fast reverse restore 84
- 7.10 Options and interfaces 84
- Function 85
- FlashCopy ordering and 87
- 8.1 Ordering FlashCopy 88
- 8.2 Activating FlashCopy 89
- License value 90
- Deactivation 90
- 8.2.2 Activation 91
- FlashCopy interfaces 93
- 9.3 z/OS-provided interfaces 96
- ========= 101
- 0000:0100 101
- 0001:0101 101
- can be incremented. To 104
- . Identify the 113
- Reverse 116
- . Identify the DS6000 117
- 9.6.5 Resynchronize target 118
- Full volume FlashCopy 121
- Data set FlashCopy 125
- Consistency Group FlashCopy 127
- Incremental FlashCopy 127
- Full volume background copy 128
- FlashCopy NOCOPY option 128
- Inband FlashCopy 130
- FlashCopy performance 135
- Terminology 136
- 10.1.3 Rank geometry 137
- 10.1.4 Incremental FlashCopy 137
- 10.6 FlashCopy scenarios 140
- FlashCopy examples 145
- 11.1.1 One-time test system 146
- 11.2 Create a backup 147
- Metro Mirror 151
- Metro Mirror overview 153
- 12.1 Metro Mirror overview 154
- 12.3 Data consistency 155
- 12.4 Rolling disaster 156
- Metro Mirror options and 157
- 13.2 Failover and failback 158
- Consistency Group option 161
- Application 162
- 13.3.4 Critical attribute 165
- 13.4.1 Fibre Channel links 167
- 13.4.2 Logical paths 168
- 13.5 Bandwidth 169
- 13.6 LSS design 169
- DS6000 #1 DS6000 #2 170
- 13.10 Hardware requirements 172
- Metro Mirror interfaces 173
- 14.2.1 Commands overview 176
- 14.2.2 CESTPAIR 176
- 14.2.3 CESTPATH 177
- 14.2.4 CDELPAIR 178
- 14.2.5 CDELPATH 178
- 14.2.6 CGROUP 178
- 14.2.7 CQUERY 179
- 14.2.8 CRECOVER 180
- 14.3 ICKDSF 181
- 14.3.3 PPRCOPY DELPAIR 183
- 14.3.4 PPRCOPY DELPATH 184
- 14.3.5 PPRCOPY ESTPATH 184
- 14.3.6 PPRCOPY ESTPAIR 185
- 14.3.7 PPRCOPY FREEZE 185
- 14.3.8 PPRCOPY QUERY 185
- 14.3.9 PPRCOPY RECOVER 188
- 14.3.10 PPRCOPY SUSPEND 188
- 14.3.11 PPRCOPY RUN 188
- 14.3.12 Refreshing the VTOC 188
- 14.6 DS Storage Manager GUI 196
- Next, the panel shown in 201
- 14.7 ANTRQST API 203
- Metro Mirror performance and 205
- 15.1 Performance 206
- 15.2 Scalability 207
- Metro Mirror examples 209
- Resynchronize the pair 210
- 16.2.1 Failover process 211
- Syslog messages 212
- 16.2.2 Failback process 213
- Establish a volume pair 219
- 51% of tracks copied so far 220
- Global Copy 223
- Global Copy overview 225
- Figure 17-1 Global Copy 226
- Copy Pending 227
- Full Duplex 227
- Global Copy options and 229
- 18.2 Catch-up transition 231
- Secondary Site 234
- Primary Site 234
- 18.5 Hardware requirements 237
- 18.6 DS6800 I/O ports 238
- I0100 I0101 I0102 I0103 238
- I0000 I0001 I0002 I0003 238
- 18.7.1 Fibre Channel links 239
- 18.8 Distance considerations 240
- Global Copy performance and 243
- 19.1 Performance 244
- 19.2 Scalability 244
- Global Copy interfaces 245
- 20.2.2 CESTPAIR 248
- 20.2.3 CESTPATH 249
- 20.2.4 CDELPAIR 249
- 20.2.5 CDELPATH 249
- 20.2.6 CGROUP 250
- 20.2.7 CQUERY 251
- 20.2.8 CRECOVER 251
- 20.2.9 CSUSPEND 252
- DS CLI supported environments 253
- 20.5 DS Storage Manager 257
- 20.5.2 Metro Mirror panel 258
- Global Copy examples 261
- FC Switch 262
- I0000 I0100 I0000 I0100 262
- 21.2.2 Cascading alternative 268
- Global Mirror overview 269
- SecondaryPrimary 270
- Subsystem 271
- Database 271
- Summary 277
- Remote site 278
- Local site 278
- 22.3.4 Introduce FlashCopy 281
- 22.4 Consistency Groups 284
- Tertiary 285
- 1 2 31 2 3 286
- Global Mirror 289
- Global Mirror options and 291
- Subordinate 293
- Consistency Group 293
- Local Site 293
- Remote Site 293
- Start Global Mirror session 300
- Local site Remote site 301
- Remote siteLocal site 304
- 23.7.2 Primary site failure 306
- Secondary 307
- Action required 310
- Failback B to A 316
- 23.7.9 Return to local site 317
- 23.7.10 Conclusions 320
- Global Mirror interfaces 321
- FlashCopy 323
- MODE(ASYNC) 323
- TSO commands 326
- DS Storage Manager 326
- ANTRQST Macro 326
- 24.3.2 Define paths 327
- To remote site 328
- LCU: 2C00 329
- LCU: 3C00 329
- LCU: 3E00 331
- 24.5.2 Define paths 338
- Remote site (secondary) 340
- Local site (primary) 340
- 24.5.7 Start Global Mirror 345
- 24.6 ANTRQST macro 351
- 24.7 DS Storage Manager GUI 352
- Pause; see Figure 24-19 354
- 01 is paused 355
- Resume, from 356
- Hold write I/O 361
- Global Mirror examples 365
- 26.2.5 Timing information 369
- 26.3.1 Define paths 370
- Example 26-8 371
- FAILBACK 382
- Restart Global Mirror session 384
- 26.5.6 Remove the paths 389
- 26.9.1 Create paths 398
- Define as Consistency Group 400
- Create to 401
- Back to correct any of 405
- , select from the 408
- Refresh 412
- 26.10.1 DS CLI profile files 414
- 26.10.2 Create paths 415
- 26.13.5 Remove paths 430
- Example 26-78 rmpprcpath 431
- Interoperability 433
- Combining Copy Service 435
- 27.1 Data migration 436
- Ter t i ar y 437
- 28.2.3 Network connectivity 440
- User ID management 444
- 28.3.1 Decoding port IDs 445
- Adding or deleting paths 446
- 28.7 z/OS Global Mirror 452
- Solutions 455
- 29.2.3 Network connectivity 458
- Administration access level 459
- Real-time manager 460
- Manage hardware 460
- Storage complexes 460
- Storage management 461
- Determining ESS volume size 462
- 29.3.1 Decoding port IDs 463
- Figure 29-4 Path panel 464
- Next to continue. In 465
- ESS Specialist 468
- Figure 29-11 Metro Mirro 471
- Figure 29-12 Pairing method 471
- Figure 29-16 Copy options 473
- IIBM TotalStorage Rapid Data 481
- Recovery 481
- 30.1 Introduction 482
- 30.2 Overview 482
- Secondar 483
- Left side disk data 484
- 30.3 Architecture 486
- AIX – Backup PCM 487
- Storage Server (s) 487
- AIX – Primary PCM 487
- function and 488
- 30.4 Additional information 489
- Center for Replication 491
- Standard Edtion Replication 492
- 31.4.1 FlashCopy 494
- 31.4.2 Metro Mirror 495
- 31.4.3 Global Copy 495
- 31.4.4 Global Mirror 495
- PPR link 497
- Copy Set 498
- Remote SiteLocal site 499
- 31.8 Volumes in a copy set 501
- 31.8.1 Host volume 502
- 31.8.2 Target volume 502
- 31.8.3 Journal volume 502
- IP Communication 504
- Services 504
- Session 508
- 31.13 Supported platforms 509
- URL of GUI (RM server) 511
- IP network 512
- password 513
- URL of GUI (RM server) 513
- user name 513
- Health Overview 514
- Sessions 514
- Storage Subsystems 514
- ESS/DS Paths 514
- 31.15.3 Sessions panel 515
- (1) Select session 516
- (2) Select action 516
- Panel heading 517
- Hyper links 517
- Interface to functional tasks 517
- RM summary 517
- 31.15.7 Advanced Tools panel 520
- 31.15.8 Console log 521
- Figure 31-27 Console log 522
- GDPS overview 525
- 32.1 GDPS solution offerings 526
- 32.1.1 GDPS/PPRC overview 527
- 32.1.2 PPRC and HyperSwap 528
- 32.1.3 RCMF/PPRC overview 528
- 32.1.4 GDPS/XRC overview 529
- 32.1.5 RCMF/XRC overview 529
- GDPS PPRC/XRC 530
- System z 531
- GDPS/PPRC HyperSwap Manager 532
- GDPS/PPRC and GDPS/XRC 532
- Concurrent Copy 533
- Concurrent Copy operation 536
- Invoking Concurrent Copy 536
- Concurrent Copy on the DS6000 536
- Sizing and requirements 537
- Where to use Concurrent Copy 538
- SMF information 539
- DFSMSdss: FlashCopy example 540
- Installation options exit 542
- SNMP notifications 543
- SNMP overview 544
- Physical connection events 544
- Remote copy events 546
- Global Mirror related events 546
- Master cannot terminate the 547
- Licensing 549
- Licenses 550
- Authorized level 551
- CLI migration 553
- Migrating ESS CLI to DS CLI 554
- Convert the individual tasks 555
- DS CLI commands 556
- ESS / DS CLI comparison 556
- Related publications 561
- Online resources 562
- How to get IBM Redbooks 563
- Help from IBM 563
- Numerics 565
- Services with IBM System z 575
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