Hp XP P9500 Storage Manuel d'utilisateur Page 16
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Noté. / 5. Basé sur avis des utilisateurs
To calculate the maximum number of pairs allowed on your system without LUSE volumes
Use the following formula:
Σ {(α) x (the number of Business Copy pairs)} ≤ (β) and Σ {(γ) x (the number of Business Copy
pairs)} ≤ (δ)
where:
• (α): Required number of differential tables per pair (per previous calculation).
• (β): Number of differential tables available in the system (Table 1 (page 14)).
• (γ): The required number of pair tables per pair (per previous calculation).
• (δ): The number of pair tables available in the system (Table 1 (page 14)).
For example, if you are to create 10 pairs of OPEN-3 volumes and 20 pairs of OPEN-V volumes
in a storage system that has 26,176 differential tables, you can use the equation as follows:
When the emulation type is OPEN-3, and if the capacity of the volume is 2,403,360 kB, the
number of differential tables required for a pair will be 3, and the number of pair tables required
for a pair will be 1. When the emulation type is OPEN-V, and if the capacity of the volume is
3,019,898,880 kB, the number of differential tables required for a pair will be 577, and the
number of pair tables required for a pair will be 17.
If you apply these numbers in equation:
3 x 10 + 577 x 20 = 11,570 less-than-or-equal-to 26,167 and also
1 x 10 + 17 x 20 = 350 less-than-or-equal-to 8,192
Thus, 10 pairs of OPEN-3 volumes and 20 pairs of OPEN V volumes can be created.
To calculate the maximum number of pairs allowed on your system with LUSE volumes
Σ[Σ {(α) x (the number of the volumes that forms LUSE volumes)} x (the number of Business Copy
pairs)] ≤ (β)
and also
Σ[Σ {(γ) x (the number of the volumes that forms LUSE volumes)} x (the number of Business Copy
pairs)] ≤ (δ)
where:
• (α): Required number of differential tables that forms a LUSE volume.
When you use LUSE volumes, each volume forming the LUSE volume uses the differential
tables. For example, if you create a Business Copy pair using LUSE volumes, which are created
by combining two OPEN-V volumes, you need differential tables for two OPEN-V pairs.
• (β): Number of differential tables available in the system (Table 1 (page 14)).
• (γ): The required number of pair tables for each volume that forms a LUSE volume.
• (δ): The number of pair tables available in the system (Table 1 (page 14)).
For example, if you are to create 10 pairs of LUSE volumes consisting respectively of three OPEN-3
volumes in a storage system that has 26,176 differential tables, you can use the inequation condition
as follows:
When the emulation type is OPEN-3, and if the capacity of the volume is 2,403,360 kB, the
number of differential tables required for a pair is 3, and the number of pair tables required for a
pair will be 1.
If you apply this number to the above-mentioned inequation:
(3 x 3) x 10 = 90 <= 26,176
and also
(1 x 3) x 10 = 30 <= 8,192
16 Requirements and planning
- Abstract 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- 1 Business Copy overview 7
- Cascaded pairs 8
- Remote Web Console GUI 9
- Initial copy 10
- Update copy 10
- 2 Requirements and planning 12
- License capacity requirements 13
- Planning pair volumes 13
- Planning number of pairs 14
- 16 Requirements and planning 16
- Planning for performance 18
- 20 Requirements and planning 20
- ◦ BC: PAIR or COPY(PD)/COPY 21
- Cache Residency 22
- Snapshot 22
- Data Retention 23
- ◦ Initializing the DP pool 24
- LUN Manager 25
- Open Volume Management 25
- Resource Partition 25
- Continuous Access Synchronous 25
- Continuous Access Journal 26
- External Storage 31
- Auto LUN 31
- Reserving secondary volumes 32
- 4. Click Finish 34
- 5 Performing pair operations 35
- 36 Performing pair operations 36
- Pair creation 37 37
- Pair creation 39 39
- 12. Click Next 40
- Pair split 42
- Pair resynchronization 44
- Pair resynchronization 45 45
- ◦ For L2 pairs 46
- Pair deletion 47
- Monitoring the system 49
- Monitoring synchronous rates 53
- Monitoring consistency groups 54
- Monitoring reserve volumes 54
- Maintaining the system 55
- 7 Troubleshooting 57
- 8 Support and other resources 66
- Typographic conventions 67
- (RWC) and RAID Manager 69
- B Business Copy GUI reference 71
- Summary tab 72
- Pairs tab 73
- Reserve Volumes tab 75
- Consistency Group tab 75
- View Pair Properties window 76
- Pair Properties tab 77
- Pairs table 77
- View Histories window 79
- Histories table 80
- Create Pair wizard 82
- Select Primary Volumes window 83
- Selected LDEVs table 84
- Available LDEVs table 86
- Confirm window 87
- Split Pairs wizard 88
- Selected Pairs table 89
- Resync Pairs wizard 91
- Suspend Pairs window 94
- Delete Pairs window 95
- Edit Mirror Units window 95
- Add Reserve Volumes Wizard 96
- Remove Reserve volume window 97
- Configuration workflow 100
- Reserving S-VOLs 100
- Reserving a consistency group 101
- Setting performance options 102
- Creating pairs 103
- Pair operations workflow 103
- Check pair status 103
- Suspending pair creation 108
- Resynchronizing pairs 109
- Deleting pairs 111
- 7. Click OK 113
- Pair Operation window 122
- Volume List 123
- Preview List 124
- Pair Operation command menu 125
- Display Filter dialog box 125
- History window 126
- Table 24 Reference Codes 127
- Option window 128
- Glossary 129
- 130 Glossary 130
- 132 Index 132
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