Hp XP P9500 Storage Manuel d'utilisateur Page 9
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for the S-VOL. Then, write I/O is allowed to the S-VOL while the pair is split. In this instance, S-VOL
and P-VOL track maps keep track of differential data and are used to resynchronize the pair.
Logical units on the local and remote systems must be defined and formatted prior to pairing.
Data path
Continuous Access Synchronous operations are carried out between local and remote systems
connected by a Fibre Channel interface. The data path, also referred to as the remote copy
connection, connects ports on the local P9500 system to the ports on the remote system. The ports
are assigned attributes that allow them to send and receive data.
One data path connection is required, but two or more independent connections are recommended
for hardware redundancy. A maximum of eight paths per control unit (CU) can be used.
Consistency groups
A Continuous Access Synchronous consistency group is a user-defined set of volume pairs.
Continuous Access Synchronous pairs that are(hereafer Cnt Ac-S pairs) and Cnt Ac-S Z pairs can
be created in the same primarya designated consistency group. You may specify a consistency
group to create or operate Cnt Ac-S pairs, using RAID Manager (RM). Also, you may specify a
consistency group to create or operate Cnt Ac-S Z pairs, using Business Continuity Manager. If
you specify consistency group for Cnt Ac-S pairs and secondary systems, on which copy operations
are performed simultaneously,Cnt Ac-S Z pairs, you can issue a command for each group and
also can ensure the consistency of these pairs in whichthe pairs' status remains consistent.same
group.
WhenIf Cnt Ac-S pairs and Cnt Ac-S Z pairs are registered in the same group, you issue a command,
it is executed on allcan ensure the consistency between Cnt Ac-S pairs and Cnt Ac-S Z pairs in the
same group. The pairs' pair status changes atIf only Cnt Ac-S pairs or only Cnt Ac-S Z pairs are
registered in the same time, dependinggroup, you can ensure the consistency of the pairs in each
group. For further information on group options.a Cnt Ac-S Z pair, see the HP P9000 Continuous
Access Synchronous for Mainframe Systems User Guide.
You can ensure consistency of data of volumes in the same DKC. Continuous Access Synchronous
allows you to configure up to 128 consistency groups (00-7F) for each MCU.
For details about creating pairs and specifying consistency groups for Continuous Access
Synchronous, and the consistency group operation, see the HP P9000 RAID Manager User Guide,
HP P9000 RAID Manager Reference Guide or the HP P9000 Business Continuity Manager User
Guide.
Data path 9
- Abstract 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- Typical components 7
- Storage systems 7
- Volume pairs 8
- Data path 9
- Consistency groups 9
- Interfaces 14
- Failover software 14
- Initial copy 15
- Update copy 15
- System requirements 16
- Preparing P9500 systems 18
- Planning volume pairs 20
- Planning I/O to the S-VOL 21
- Managing differential data 21
- Synchronous 22
- 16,384Base (16KLDEV, SI/VM) 22
- Planning volume pairs 23 23
- Planning data paths 25
- 3 km4 Gbps 26
- 1.5 km8 Gbps 26
- Planning ports 27
- Planning consistency groups 28
- Host failover software 30
- Continuous Access Journal 32
- Business Copy 33
- LUN Expansion 35
- Virtual LVI/LUN 35
- Cache Residency 35
- LUN Manager 36
- Thin Provisioning 36
- Performance Monitor 36
- Auto LUN 37
- Data Retention 37
- Thin Provisioning Z 38
- Data Retention 39 39
- 5 Configuration operations 40
- 42 Configuration operations 42
- • When CU Free is selected 43
- 44 Configuration operations 44
- 48 Configuration operations 48
- 6 Pair operations 49
- 50 Pair operations 50
- Split pairs 51
- Resynchronize pairs 52
- Release pairs 53
- Change fence level 54
- 7 Monitoring and maintenance 55
- Pair status definitions 56
- Split and suspend types 57
- Export pair information 58
- Monitor copy operations, I/O 59
- Select data to be graphed 60
- Resize graph, save data 61
- Delete logical paths 62
- RCU maintenance 63
- General information 64
- Miscellaneous maintenance 65
- Media maintenance 66
- 8 Data migration 67
- Disaster recovery overview 68
- Analyze S-VOL currency 69
- 10 Troubleshooting 72
- Error codes and messages 76
- Pinned track recovery 83
- Contacting HP 84
- Related information 84
- Typographic conventions 85
- Pair Operation window 88
- Paircreate dialog box 93
- Pairsplit-r dialog box 94
- Pairresync dialog box 94
- Pairsplit-S dialog box 95
- Change Pair Option dialog box 95
- Display Filter dialog box 96
- RCU Operation window 97
- RCU Status dialog box 101
- Add RCU dialog box 103
- RCU Option dialog box 104
- Add Path dialog box 105
- Add SSID dialog box 105
- Usage Monitor window 106
- History window 107
- Export operations history 108
- History window notes 108
- System Option window 109
- Glossary 110
- 112 Index 112
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