Veritas Storage Foundation Intelligent Storage Provisioning 5.0.1 Administrators Guide, HP-UX 11i v3, First Edition, November 2009
The attributes for a snapshot are specified as a tuple to the vxsnap make command.
This command accepts multiple tuples; one for each snapshot that is being created.
Each element of a tuple is separated from the next by a slash character (/). Tuples
are separated by white space.
To create and manage a space-optimized instant snapshot
1
Create a shared cache object, and prepare a snapshot that uses this cache.
See “Creating a shared cache volume and preparing space-optimized
snapshots” on page 101.
2
To create a space-optimized instant snapshot, snapvol, use the following
forms of the vxsnap make command:
# vxsnap [-g diskgroup] make source=vol/snapvol=snapvol
For example, to create the space-optimized instant snapshot of the volume,
myvol, in the disk group, mydg, and the prepared snapshot, snap3myvol,
enter the following command:
# vxsnap -g mydg make source=myvol/snapvol=snap3myvol
3
Use fsck (or some utility appropriate for the application running on the
volume) to clean the temporary volume’s contents.
For example, you can use the following command:
# fsck -F vxfs /dev/vx/rdsk/diskgroup/snapshot
4
If you require a backup of the data in the snapshot, use an appropriate utility
or operating system command to copy the contents of the snapshot to tape,
or to some other backup medium.
5
You now have the following choices of what to do with a space-optimized
instant snapshot:
■ Refresh the contents of the snapshot. This creates a new point-in-time
image of the original volume ready for another backup. If synchronization
was already in progress on the snapshot, this operation may result in large
portions of the snapshot having to be resynchronized.
See “Refreshing an instant snapshot” on page 118.
■ Restore the contents of the original volume from the snapshot volume.
The space-optimized instant snapshot remains intact at the end of the
operation.
See “Restoring a volume from an instant snapshot” on page 120.
111Administering instant snapshots
Creating instant snapshots