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Chapter 2. System structure and design 53
Table 2-3 PU chip allocation
On a single-book configuration, model A08:
– When a PU failure occurs on a dual-core chip, the two standard spares PUs are used
to recover the failing chip, even though only one of the PUs has failed.
– When a failure occurs on a PU on a single-core chip, one standard spare PU is used.
The system does not issue an RSF call in either of the above circumstances.
When a non-characterized PU is used as a spare, in case the system has run out of the
standard spares, or when all PUs have been assigned and no non-characterized PU
remains available, an RSF call occurs to request a book repair.
On a multi-book configuration, models B16, C24, or D32:
– In a first step, the standard spare PUs of the MCM where the failing PU resides is
assigned as spare, in the same manner as for a one-book system.
– In a second step, when there are not enough spares in the book with the failing PU,
non-characterized PUs in other books are used for sparing. When “cross-book” sparing
occurs, the book closest to the one with the failing PU will be used.
For example, if a PU failure in Book-1 cannot be solved within locally, spares in Book-2
or Book-0 are then selected. When no spares are available in any adjacent book,
Book-3 is approached for a spare PU.
2.2.5 Memory design
As for PUs and the I/O subsystem designs, the z990 memory design equally provides great
flexibility and high availability, allowing:
Concurrent Memory upgrades (except when the physically installed capacity is reached.)
The z990 servers may have more physically installed memory than the initial available
capacity. Memory upgrades within the physically installed capacity can be done
concurrently by the Licensed Internal Code, and no hardware changes are required.
Concurrent memory upgrades can be done via Capacity Upgrade on Demand or
Customer Initiated Upgrade. Note that memory upgrades
cannot be done via Capacity
BackUp (CBU); see Table 8-1 on page 190 for more information.
Core Core X = CP, IFL, ICF, or zAAP
Single core
0- X -
2- X -
4- X -
6- X -
Dual core 8 9 X Spare
A B X Spare
C D X SAP
E F X SAP
- IBM zSeries 990 1
- Technical Guide 1
- May 2004 3
- Second Edition (May 2004) 4
- Contents 5
- Contents v 7
- Trademarks 10
- Become a published author 12
- Comments welcome 12
- 1.1 Introduction 15
- 1.2 z990 models 16
- 1.3.1 Processor 17
- 1.3.2 Memory 18
- 1.3.6 Spanned channels 19
- 1.3.7 I/O connectivity 20
- Up to 1024 ESCON channels 21
- FICON CTC function 22
- FICON Cascaded Directors 22
- OSA-Express 22
- Gigabit Ethernet 23
- 1000BASE-T Ethernet 23
- Token Ring 23
- 1.3.8 Cryptographic 24
- Internal Coupling (IC) 26
- 1.3.11 Hardware consoles 27
- 1.3.12 Concurrent upgrades 27
- Capacity BackUp (CBU) 28
- 1.3.13 Performance 29
- 1.3.15 Software 30
- 1.3.16 Software support 31
- Software pricing 32
- 1.3.17 Summary 33
- System structure and design 35
- STI Slots 36
- Memory cards 36
- Memory Cards 37
- Book 0Book 3 Book 1 Book 2 38
- MRU 0 MRU 1 38
- 2.1.3 Memory 39
- 2.1.4 Ring topology 41
- 2.1.5 Connectivity 43
- Book upgrade 44
- Book front view 44
- STI connectors 44
- 2.1.6 Frames and cages 45
- I/O cages 46
- 2.1.7 The MCM 47
- Figure 2-11 MCM chip layout 48
- 2.1.9 Summary 49
- 2.2 System design 50
- 2.2.2 Book design 51
- Memory Card 52
- MBA Card 52
- 2.2.3 Processor Unit design 53
- Compression Unit on a chip 55
- Without BHT: 56
- With BHT: 56
- IEEE Floating Point 57
- Translation Lookaside Buffer 57
- Instruction grouping 57
- Extended Translation Facility 58
- Central Processors 59
- Internal Coupling Facilities 60
- Purpose of a zAAP 61
- System Assist Processors 62
- Reserved processors 63
- Application preservation 64
- Sparing rules 64
- 2.2.5 Memory design 65
- Memory allocation 66
- Central storage (CS) 67
- Expanded storage (ES) 67
- 2.2.6 Modes of operation 68
- Logical Partitioning overview 69
- Logically partitioned mode 72
- * ’ and then 73
- 2.2.7 Model configurations 74
- Software models 75
- PU conversions 76
- Capacity Backup (CBU) 77
- Software model MSU values 78
- 2.2.8 Storage operations 79
- ESA/390 mode 80
- ESA/390 TPF mode 81
- Coupling Facility mode 81
- Linux Only mode 81
- 2.2.9 Reserved storage 82
- 2.2.12 I/O subsystem 83
- 2.2.13 Channel Subsystem 84
- I/O system structure 85
- 3.1 Overview 86
- Figure 3-2 z990 I/O cage 88
- Domain I/O slots in domain 88
- I/O Cage 90
- CEC Cage 90
- STI-2 Extender card 91
- STI-3 Extender card 91
- 2084-B16 CEC Cage 92
- I/O Cage 1 I/O Cage 2 92
- 2084-D32 CEC Cage 94
- I/O Cage 1 95
- /O Cage 2 95
- 3.3.1 I/O feature cards 96
- PCIXCC 0868 97
- PCICA 0862 97
- I/O Cage 1 - Front 98
- I/O cage slot 99
- PCHID numbers 99
- 3.4 Connectivity 101
- Configuration rules notes 102
- Spanned and shared channels 103
- 3.4.2 ESCON channel 105
- 16-port ESCON channel sparing 107
- Channel Sparing 108
- 3.4.3 FICON channel 109
- FICON Express SX feature 110
- 3.4.4 OSA-Express adapter 111
- HiperSockets function 116
- ISC-3 link 117
- ICB-4 link 118
- ICB-3 link 118
- ICB-2 link 118
- IC links 119
- 3.4.7 Cryptographic features 120
- Channel Subsystem 121
- LCSS 0, 1, 2, 3 30 30 1024 122
- Multiple Image Facility (MIF) 123
- Logical partition number 123
- Logical partition identifier 124
- MIF Image ID (MIFID) 124
- Logical partition name 124
- 4.1.3 Channel spanning 126
- 4.3 LCSS-related numbers 129
- Cryptography 131
- Chapter 5. Cryptography 121 133
- Programming 134
- Chapter 5. Cryptography 123 135
- 5.3.2 The PCICA feature 137
- 5.3.3 Configuration rules 138
- Chapter 5. Cryptography 127 139
- PCICA 6 2 12 16 30/30 139
- PCIXCC 4 1 4 16 30/30 139
- 5.5 Software requirements 141
- Software support 145
- 6.1 Operating system support 146
- 6.2 z/OS software support 146
- G5, G6, z800, or z900 148
- Planned z/OS V1.6 support 150
- 6.2.3 HCD support 152
- 6.2.4 Automation changes 152
- 6.2.5 SMF support 152
- 6.2.6 RMF support 153
- 6.2.7 ICKDSF requirements 153
- 6.2.8 ICSF support 153
- Stand-alone dump 154
- Automation 154
- 6.3 z/VM software support 157
- 6.5 TPF software support 158
- 6.6 Linux software support 159
- 6.8 Workload License Charges 162
- Processor identification 163
- Channel to channel links 164
- Sysplex functions 167
- 7.1 Parallel Sysplex 168
- High capacity 169
- Dynamic workload balancing 169
- Systems management 170
- Resource sharing 170
- Single system image 170
- Message Time Ordering 171
- External Reference ID 172
- Link Type z990 Max 176
- Peer mode links 177
- Meaning of PARTITION 178
- Function Setup 179
- Function 180
- 7.3.1 Benefits 181
- 7.3.2 CF structure duplexing 182
- 7.3.3 Configuration planning 182
- CF to CF link 183
- CF structure duplexing 183
- 7.4.1 GDPS/PPRC 184
- GDPS/PPRC HyperSwap™ 185
- Planned HyperSwap 186
- Unplanned HyperSwap 186
- GDPS FlashCopy® V2 support 187
- 7.4.2 GDPS/XRC 188
- Application 189
- IRD overview 190
- 7.5.1 LPAR CPU management 191
- Value of CPU management 192
- Workload type Priority 195
- Unique LPAR cluster names 196
- 7.5.6 References 197
- Capacity upgrades 199
- 8.1 Concurrent upgrades 200
- Model upgrades 201
- Planned upgrades 201
- Unplanned upgrades 202
- Capacity upgrade functions 202
- CUoD for processors 203
- CUoD for memory 205
- + Model upgrade 206
- CUoD for I/O 207
- Internet 210
- Activation 213
- Initiation 216
- Ordering 216
- $ 217
- 8.5 Capacity BackUp (CBU) 218
- CBU activation 220
- Image upgrades 220
- CBU deactivation 220
- CBU testing 221
- 8.6 Nondisruptive upgrades 222
- 8.6.1 Upgrade scenarios 223
- ^ zSeries 990 Technical Guide 224
- 8.7.1 Balanced system design 231
- Multi-book structure 232
- Book 0 Book 1 233
- 8.7.2 Superscalar processors 234
- 8.8 Capacity measurements 235
- LSPR workloads prior to z990 237
- LSPR workloads for z990 238
- CB-S 20% 10% 15% 17.5% 25% 240
- 20%----20% 240
- 20% 30% 20% 15% - 20% 240
- Workload type 241
- LSPR-Mix 241
- (Default) 241
- Environmental requirements 243
- 9.1 Introduction 244
- 9.2 Weights 245
- 9.3 Dimensions 246
- Hardware Management Console 247
- G5/G6 Series 249
- different Hardware 250
- Token-Ring LAN 251
- Enterprise 252
- Ethernet LAN 253
- Token-Ring 255
- Remote operations 256
- Support Element 257
- Fiber optic cabling services 261
- Glossary 255 267
- Glossary 257 269
- ESCON channel 270
- Glossary 259 271
- Related publications 273
- Online resources 274
- Related publications 263 275
- Numerics 277
- (0.5” spine) 281
- 0.475”<->0.873” 281
- 250 <-> 459 pages 281
- zSeries 990 284
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