Hp XP Continuous Access Software Bedienungsanleitung Seite 48
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Table 15 Relationship Between Additional Shared Memory and Total Number of Bitmap Areas
in the Storage System
Total Number of Bitmap Areas in the
Storage System
Additional Shared Memory for XP Continuous Access Journal
0No additional shared memory for XP Continuous Access Journal
7,424Additional shared memory for XP Continuous Access Journal is installed
16,384Extension 1
32,768Extension 2
44,256Extension 3 (available only for XP24000 Disk Array)
65,536Extension 4 (available only for XP24000 Disk Array)
Use the following formula to calculate the maximum possible number of pairs that can be
created on the basis of the number of bitmap areas described in Table 15 (page 48) and the
required number of bitmap areas you calculated:
The maximum number of pairs = ( Number of bitmap areas required number of bitmap
areas )
The … symbols around a value indicate that the value should be rounded down to the nearest
integer.
If the calculated maximum number of pairs exceeds 32,768, the actual maximum number of
pairs is limited to 32,768.
The capacity of OPEN-V is variable. To get the maximum number of pairs of OPEN-V, calculate
the number by using the formula.
Caution: The bitmap areas that are used for XP Continuous Access Journal are also used for
Universal Replicator for Mainframe, XP Continuous Access, and TrueCopy for Mainframe. If
you use XP Continuous Access Journal with Universal Replicator for Mainframe, XP Continuous
Access, and TrueCopy for Mainframe, use the total number of each pair to calculate the
maximum number of pairs. In addition, if XP Continuous Access Journal and XP Continuous
Access share the same volume, use the total number of both pairs even if the shared volume
is primary or secondary.
Journal Groups
The XP Continuous Access Journal journal groups have the following requirements:
• Each XP Continuous Access Journal pair must be assigned to only one journal group.
Table 16 (page 48) shows the specifications for journal groups.
Table 16 Journal Group Specifications
Support SpecificationsItem
Up to 256 journal groups (Number 0 to 255) per storage
system
Number of journal groups
The recommended number of journal groups is up to 16.
Up to 8,192Number of data volumes in a journal
group
In the 3DC configuration which consists of three Continuous
Access Journal sites, up to 16,384.
(8,192 (maximum number of volumes in a mirror) 2 (mirrors)
= 16,384)
Note that whether the maximum number of data volumes
available for a journal group on the local storage system
48 Preparing for XP Continuous Access Journal Operations
- Journal Software User Guide 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- Contents 7 7
- XP Continuous Access Journal 8
- Features 9
- Benefits 9
- Business Solutions 10
- Functionality Overview 11
- Journal Obtain 12
- Journal Copy 12
- Journal Restore 12
- Storage Systems 14
- Logical Disk Controllers 14
- Systems) 15
- Consistency Groups 15
- Remote Copy Connections 16
- Journal Groups 17
- Data Volume Pairs 18
- Journal Volumes 18
- OPEN-VDKU (drive) 19
- Host Failover Software 20
- Initial Copy Operation 21
- Update Copy Operation 22
- Journal Group Operations 23
- Update Copy Failure 24
- Journal Processing 25
- Types of Journals 26
- Pair Status 32
- Split Types (PSUS) 38
- Suspend Types 40
- Suspension Condition 41
- Requirements and Restrictions 43
- Logical Unit (LU) Types 45
- Maximum Number of Pairs 47
- Duplicate Volumes 50
- Installing the Hardware 51
- Access Journal Operations 53
- Primary Site 64
- Access Journal Volumes 72
- Virtual LUN 75
- Cache Residency Manager 76
- LUN Manager 76
- XP Thin Provisioning 76
- XP Performance Control 76
- XP Business Copy 76
- 3DC Cascading Configuration) 93
- Basic Behavior 101
- Hardware Configuration 102
- Setup Procedure 103
- Restrictions About 2DC 104
- Data Retention Utility 106
- XP Auto LUN Software 108
- Planning of Journal Volumes 109
- Arranging Journal Volumes 110
- Journal Volume Capacity 110
- Secondary Storage System 112
- Disk Array 113
- Configuration 114
- Journal Operation Window 116
- Pair Operation Window 121
- DKC Operation Window 130
- Usage Monitor Window 135
- History Window 136
- Optional Operation Window 141
- Configuring Port Attributes 144
- Systems (Add DKC) 147
- Adding Logical Paths 150
- Adding Logical Paths 151 151
- Deleting Logical Paths 154
- Turning Power On 157
- 6 Using Journal Groups 159
- 160 Using Journal Groups 160
- 162 Using Journal Groups 162
- 166 Using Journal Groups 166
- 168 Using Journal Groups 168
- 170 Using Journal Groups 170
- Deleting a Journal Group 171
- 172 Using Journal Groups 172
- 174 Using Journal Groups 174
- 176 Using Journal Groups 176
- Figure 80 Paircreate Window 182
- Recovering a Pinned Track 195
- 8 Usage Monitor Operations 197
- 198 Usage Monitor Operations 198
- Figure 86 Display Item Window 199
- Performed) 205
- 3DC Cascading configuration 207
- 10 Troubleshooting 216
- Calling HP Technical Support 240
- Related Documentation 241
- HP Technical Support 242
- Subscription Service 242
- HP Websites 242
- Documentation Feedback 242
- Glossary 243
- 244 Glossary 244
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