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Using Snapshots
102 Snap Server Administrator Guide
Coordinating Snapshot and Backup Operations
Like backups, Snapshots can be scheduled to recur at a designated time and
interval. In addition to synchronizing the backup and Snapshot schedules, you
must create a share (and Snapshot share) to the root of the volume so that the
backup software can access the Snapshot.
1
Create a Snapshot for each volume you want to back up.
In the Administration Tool, navigate to the
Storage > Snapshots
screen
,
and click
Create Snapshot
. When defining and scheduling the Snapshot, consider the
following:
• In the Create Recovery File pull-down menu, select Yes to ensure that the ACL
and quota information current at the time the Snapshot is captured is
appended to the Snapshot. This step is needed because many backup packages
do not backup native ACLs and quotas. Placing this information in a recovery
file allows all backup systems to include this information. If the volume needs
to be restored from tape, or the entire system needs to be recreated from
scratch on a different server, this information may be required to restore all
rights and quota information.
• Offset the Snapshot and backup schedules such that the backup does not occur
until you are sure that the Snapshot has been created. (The Snapshot itself does
not require much time, but creating the recovery file may take up to 30
minutes, depending on the number of files in the volume.) For example,
assuming you schedule nightly backups for a heavily used volume at 3 a.m.,
you might schedule the Snapshot of the volume to run every day at 2:30 a.m.,
allowing half an hour for the Snapshot to run to completion.
2
Create a share for each volume with Snapshot Share enabled.
In the Administration Tool, begin by clicking the
Security > Shares
screen,
and
click
Create Share
. Select the volume and click
Continue
. Then, to create a share to
the volume itself (on the root), simply accept the default path by clicking
Use
Current Path
. Finally, be sure to select
Create Snapshot Share
.
3
Set the backup software to archive the latest version of the Snapshot.
The Snap Server makes it easy to configure your backup software to
automatically archive the most recent Snapshot. Simply configure your backup
software to copy the contents of the
latest
directory within the Snapshot share
you created at the root of the volume. For example, assume the Snapshot share
named
SHARE1_SNAP
contains the following four directories:
latest 2002-12-25.120000 2003-01-01.000100 2003-01-07.020100
- Snap Server 1
- Administrator Guide 1
- ETRUST ANTIVIRUS 6
- Contents 7
- Chapter 6 Data Protection 93 10
- Audience 13
- Tips and Cautions 13
- Document Organization 14
- Typographical Conventions 15
- Related Documents 16
- Contacts 17
- Getting Started 19
- Networking 20
- Security 20
- Feature Description Page 21
- Applications 22
- • Discovering Snap Servers — 23
- • Getting Information — 23
- • Setting IP Addresses — 23
- The Administration Tool 24
- Chapter 1 Getting Started 7 25
- Chapter 2 27
- Connecting to the Network 30
- Initial Configuration Tasks 48
- •Server number — 49
- • Serial number — 49
- Registering your Server 53
- Networking Options 55
- Protocol Default Comments 56
- Configuring TCP/IP 57
- • Half-duplex Ethernet — 58
- • Full-duplex Ethernet — 58
- Configuring TCP/IP Settings 59
- to update 60
- Option Settings 60
- Configuring Windows Access 61
- Configuring NFS Access 63
- Configuring a DHCP Server 66
- Connecting from a Client 67
- Web Browser (HTTP) 69
- Storage Configuration and 71
- Management 71
- Storage Configuration Options 73
- Create Snapshot Share 75
- Before You Begin 76
- Using the RAID Storage Wizard 77
- Creating a RAID 78
- Creating a Volume 79
- Creating a Share 80
- Managing and Repairing RAIDs 81
- Determining RAID Set Status 82
- Adding Disk Drives to a RAID 83
- Managing Volume Usage 85
- Disabling Quotas 87
- Tracking Volume Usage 87
- Hot Swapping Disk Drives 88
- Security Management 91
- Default Security Settings 92
- Physically Secure the Server 93
- Configure Users and Groups 94
- Macintosh and FTP Access 95
- • Changing UIDs or GIDs — 96
- Directory 98
- Joining an NIS Domain 101
- Web View Authentication 102
- Secure HTTPS 102
- Caution 106
- How Permissions are Applied 110
- Supported Permissions 110
- Data Protection 111
- Data Backup Options 112
- Backup Express for GuardianOS 113
- PowerQuest DataKeeper 114
- Backup Solutions 115
- Using Snapshots 116
- Recurring Snapshots 117
- Managing the Snapshot Pool 117
- Accessing Snapshots 118
- Snapshot Rollback 121
- Using Backup Express for 122
- GuardianOS 122
- Components 123
- Backup Modes 123
- Restore Modes 124
- Planning Backup Procedures 124
- Backup Schemes 125
- Backing Up Data 126
- Restoring Data 127
- Defaults 128
- Managing the Catalog 130
- The Disaster Recovery Files 132
- Disaster Recovery Procedures 134
- Restoring the Data from Tape 136
- Chassis Failure 137
- Chapter 7 139
- Using Status Screens 142
- Using the Event Log 143
- Local Scanner and Log Views 146
- Using the Local Scanner 147
- The Local Scanner Window 148
- Setting the Scan Options 149
- Setting Selection Options 150
- Setting Display Options 150
- Viewing Directory Paths 151
- About Signature Updates 151
- Setting Schedule Options 152
- Setting Incoming Options 153
- Understanding Alert Options 156
- The Report Tab 156
- Setting Alert Filter Options 157
- Other Local Scanner Options 158
- Using the Move Directory 159
- Using the Log Viewer Window 159
- The Log Viewer List 160
- Troubleshooting 161
- Using Maintenance Modes 162
- Snap Server Specifications 165
- Feature Specification 166
- Taiwan Statement 170
- Appendix B 171
- General Guidelines 173
- • Recover — 178
- • Nsrretrieve — 178
- Upgrading Backup Express for 181
- Jukebox Support 181
- Upgrade Notes 182
- Glossary 183
- Term Definition 184
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