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5 Replicating storage
Replication is an industry-standard term for making copies or backing up data. With HP P6000
EVA storage systems, entire virtual disks can be replicated locally or remotely using a variety of
methods:
• HP P6000 Business Copy (local replication). Make local copies of virtual disks using snapclones,
snapshots, mirrorclones and preallocated containers. Replicated virtual disks are located on
the same storage system as the source.
• HP P6000 Continuous Access (remote replication). Make remote copies of virtual disks.
Replicated virtual disks are located on a different storage system than the source, typically at
a geographically separate site.
This chapter focuses on using the local replication features in HP P6000 Command View. For
information on using the remote replication features in HP P6000 Command View, see the HP
P6000 Continuous Access Implementation Guide.
HP P6000 Business Copy software
HP P6000 Business Copy software is a licensed feature of HP P6000 EVA storage systems that
enables you to:
• Create point-in-time copies, called snapshots and snapclones, and ongoing copies called
mirrorclones of virtual disks
• Specify snapshot, snapclone, and mirrorclone properties, such as redundancy (Vraid) level,
read cache, and write protection.
• Present snapshots, snapclones, and mirrorclones as disks to hosts
• Allow host I/O to snapshots and snapclones
• Instantly restore the content of a virtual disk from snapshots or mirrorclones or from snapshots
of mirrorclones
HP recommends that you unmount the target virtual disk before restoring the data. This ensures
that the host server cache is flushed.
IMPORTANT: Before initiating online migration, be sure to perform a full backup of the
virtual disk.
• Perform virtual disk online migration, which allows you to change the Vraid of the virtual disk,
move a virtual disk from one disk group to another, or do both in a single action without
impacting host I/O.
Features vary based on the storage system controller software version. For specific supported
features and maximums, see HP P6000 Enterprise Virtual Array Compatibility Reference. Specialized
replication user interfaces, such as HP P6000 Replication Solutions Manager, offer additional
features.
Snapclones
A snapclone is an independent point-in-time copy of a virtual disk. It is independent because all
of the data from the source virtual disk is copied to the snapclone. Use snapclones when you need
independent and durable copies; for example, for data mining, data warehousing, or preproduction
testing.
Follow these guidelines for the use of snapclones:
• The storage system must have a local replication license.
• A snapclone can be in a different disk group than the source.
36 Replicating storage
- User Guide 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- 1 Overview 7
- 8 Overview 8
- 4. Browsing computer1. LAN 10
- 5. Hosts2. SAN 10
- 3. HP EVA4400 storage systems 10
- 10 Overview 10
- User interface 11
- Storage systems point of view 12
- Settings point of view 13
- 14 Overview 14
- Internet Protocol support 15
- Password formats 16
- Considerations 17
- License types 20
- Instant-on licenses 20
- Permanent licenses 20
- Data migration licenses 21
- FCIP licenses 21
- Obtaining license keys 22
- Retrieving licenses 23
- Entering license keys 23
- Importing licenses 24
- 4 Provisioning storage 26
- Disk types 27
- Disk group types 27
- General guidelines 27
- Disk group capacity 28
- Redundancy (Vraid) levels 29
- Virtual disks 30
- 32 Provisioning storage 32
- Presentation 33
- Online virtual disk migration 33
- Mirrorclone migration 34
- Thin provisioning 34
- Online Help 35
- 5 Replicating storage 36
- Snapshots 37
- Mirrorclones 38
- Containers 40
- Optimizing snap creation 41
- 42 Replicating storage 42
- DR groups 43
- Creating DR groups 44
- Initializing storage systems 46
- User-initiated service mode 47
- Starting the storage system 48
- Figure 10 HSV450 rear view 49
- Resynchronizing controllers 50
- Hardware 50
- Verifying hardware status 51
- Remote service test 51
- Configuring iSCSI devices 53
- Events overview 55
- Viewing events 56
- Viewing events 57 57
- Configuring host notification 58
- Filtering events by severity 59
- Retrieving the parse file 60
- Sending the event file 62
- Creating page footer messages 63
- Setting audit logging options 64
- Configuring SNMP credentials 66
- Optimizing performance 67
- Using the right-click menu 67
- Failed transceiver 70
- Failed I/O module 70
- Failed blower power supply 70
- Version numbers differ 72
- Performance Data Collector 74
- Events and logs 79
- Logging configuration file 79
- Configuration recommendations 80
- SSL protocol 81
- Prohibited commands 81
- Backward compatibility 81
- Using friendly names 82
- Using friendly names 83 83
- Using short names 84
- Viewing storage systems 85
- Specifying the output 85
- Filtering data 86
- Commands 87
- Command modifiers 89
- Data filtering 92
- Objects and counters 93
- HP EVA virtual disk 94
- HP EVA virtual disk group 95
- HP EVA host connection 96
- HP EVA host port statistics 96
- HP EVA physical disk 96
- HP EVA physical disk group 97
- HP EVA DR tunnels 97
- HP EVA DR Group Information 98
- HP EVA Xcopy Metrics 99
- HP EVA WSame Metrics 99
- HP EVA Unmap Metrics 100
- Contacting HP 101
- Related information 101
- Typographical conventions 102
- 12 Documentation feedback 103
- Event code format 104
- Corrective action codes 105
- Coupled crash control codes 106
- Dump/restart control codes 107
- Glossary 108
- 110 Glossary 110
- 112 Index 112
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