Hp StorageWorks XP Remote Web Console Software Bedienungsanleitung Seite 39
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Figure 6 Selecting and Settling Journal at the Secondary Subsystem
The secondary subsystem settles and restores the journal data to the secondary data volume as follows:
• Journal d
atastoredinthe cache
The journal data is copied to the corresponding cached track and promoted to formal data.
• Journal data stored in the restore journal volume
The journ
al data is read from the restore journal volume to cache. The journal data that is read to
cache is copied to the existing cache track and promoted to formal data. After that, the space for
the restore journal volume is released.
Types of Journal
In addition to the journal data for updating, the primary subsystem sends control information to the
secondary subsystem. This control information indicates when volume pair status changes and when
a primary subsystem power-off sequence is initiated, and also maintain sequence numbers in periods
of low host activities.
Journa
lGroup Operations
URz jou
rnal groups enable update sequence consistency to be maintained across a journal group of
volum
es. The primary data volumes and secondary data volumes of the pairs in a journal group must
be located within one physical primary storage system and one physical secondary storage system
(1-to-1 requirement).
When m
ore than one data volume is updated, the order that the data volumes are updated is managed
within the journal group that the data volumes belong to. Consistency in data updates is maintained
among paired journal groups. URz uses journal groups to maintain data consistency among data
volu
mes.
This section describes the following journal group operation options available in URz:
• Timer type option
• Jour
nal group operations
Hitachi Universal Replicator for z/OS user guide for XP12000/XP10000 Disk Arrays and SVS 200
39
- SVS 200 1
- Contents 3
- Figures 8
- About this Guide 13
- Document Conven 14
- Getting Help 15
- Benefits 18
- Business Solutions 18
- Hitachi Shad 19
- Journal Obtain 22
- Journal Copy 22
- Journal Restore 22
- URz Components 23
- Main and Remote C 25
- Journal Group 25
- Data Volume Pair 26
- Journal Volume 26
- Remote Copy Connections 28
- URzRemoteConsole Software 29
- Host I/O 29
- Time-Stamping Function 29
- Remote Copy Operations 30
- Update Co 31
- Journal Group Operations 31
- Logical DKC (LDKC) 33
- Update Copy Operation 35
- Journal Processing 36
- Creating and S 37
- Storing Journa 38
- Types of Journal 39
- URz Delta Resync Operation 40
- Journal Obta 41
- URz Pair Status 45
- Pair Status Description 47
- Suspend Types 48
- URz Suspension Condition 50
- Command Device 53
- System Requirements 55
- Disk Track Format 56
- Logical Volume Types 57
- The Maximum Number of Pairs 59
- Installing the Hardware 64
- Enabling the URz Option(s) 66
- Planning of Journal Volumes 67
- Journal Volume C 69
- DKC Journal Transfer Speed 70
- System for Remote Console 72
- Basic Behavior 73
- Storage Systems are Used) 74
- Extended Consistency Groups 74
- Systems 77
- Disaster Recov 78
- Combining URz w 79
- Combining 81
- Figure 25 Res 85
- Using At-T 87
- Business Continuity Manager 88
- Hardware Configuration 91
- Setup Procedure 92
- Configuration) 100
- Operation Window 107
- Displaying Info 111
- Configuring Port Attributes 112
- Changing Option 116
- Adding Logical Paths 117
- Deleting Logical Paths 118
- Viewing the St 119
- Removing 121
- Secondar 121
- 5 Using Journal Groups 123
- Using Journal Groups 124
- Caution: 128
- Cautions: 132
- Deleting a Journal Group 141
- Splitting a 142
- Consistency Group 145
- Saving Pair S 154
- Displayin 159
- 7 Monitoring Remote Copy 171
- Operations 171
- Statistic Description 174
- 8Viewing HistoryofDataVolume 175
- Pair Operations 175
- Displaying th 181
- Clearing SIMs 183
- Displaying a L 190
- A master journal group 191
- A restore journal group 191
- Switching Opera 198
- 12 Troubleshooting 201
- Path Status 203
- Troubleshooting 208
- 13 Power Management for Disk 209
- Storage Systems and Network 209
- Relay Devices 209
- Volumes 213
- 15 SIM Reporting 215
- Acronyms and Abbreviations 218
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