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Snapshots
Data ONTAP Fundamentals
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Objectives
Upon completion of this module you will be
able to: Describe how snapshots function
Recognize and perform snapshot commands Set and modify snapshot
options
Create a snapshot schedule
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Snapshot Overview
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Snapshot Overview
Snapshots are scheduled on the Storage Appliance
Weekly, nightly, hourly
Administrators can do backups without taking the system
offline
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Snapshot Overview
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Snapshot Overview
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Snapshot Overview
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Snapshot Overview
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Snapshot Commands
snap create [volume_name] [snapshot_name]
snap list [volume_name]
snap delete [volume_name] [snapshot_name]
snap delete -a [volume_name]
snap rename [volume_name] [old_file_name] [new_file_name]
snap reserve [volume_name] [percent]
snap sched [volume_name [weekly [nightly [ hourly[@list]]]]]
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Snap List Command
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Snapshot Options
Disable automatic snapshots vol options volname nosnap
[on|off]
Make .snapshot directory invisible to clients,
and turn off access to .snapshot directory vol options volname
nosnapdir [on|off]
Make ~snapshot directory visible to CIFS
clients
options cifs.show_snapshot [on|off]
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Snapshot Options
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# pwd
/filer /.snapshot
# ls -l
total 240
drwxrwxrwx 9 root other 12288 Jan 29 16:19 hourly.0
drwxrwxrwx 9 root other 12288 Jan 29 16:19 hourly.1drwxrwxrwx 9
root other 12288 Jan 29 16:19 hourly.2
drwxrwxrwx 9 root other 12288 Jan 29 16:19 hourly.3
drwxrwxrwx 9 root other 12288 Jan 29 16:19 hourly.4
drwxrwxrwx 9 root other 12288 Jan 29 16:19 hourly.5
drwxrwxrwx 9 root other 12288 Jan 29 16:19 nightly.0
drwxrwxrwx 9 root other 12288 Jan 29 16:19 nightly.1
drwxrwxrwx 9 root other 12288 Jan 29 16:19 weekly.1
drwxrwxrwx 9 root other 12288 Jan 29 16:19 weekly.2
#
Snapshot View from a UNIX Client
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Snapshot View from a Windows Client
Note: Snapshots are visible to
Windows clients that have File
Manager configured to display
hidden files
Note: Snapshots are visible to
Windows clients that have File
Manager configured to display
hidden files
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Topic Review
How do snapshots function?
What are some of the snapshot commands?
What are some of the snapshot options?
Describe the snapshot schedule syntax.
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Topic Review
How do snapshots function? When a snapshot is created, it
identifies all the blocks in the
active file system.
What are some of the snapshot commands? snap create, snap
delete,snap list, snap sched,snap reserve
What are some of the snapshot options? vol options volname
nosnap
vol options volname nosnapdir options cifs.show_snapshot
Describe the snapshot schedule syntax snap sched vol0 2 6
8@8,12,16,20
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Exercises
