Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Volume Snapshots
48 VERITAS Volume Manager Administrators Guide
1If vxsnap is used, the snapshot can be selectively removed following restoration of the original volume.
2 Restoration does not remove the snapshot.
3 Synchronization of the snapshot volume must be complete.
4 Persistent FastResync must have been enabled.
Comparison of Snapshot Features for Supported Snapshot Types
Snapshot Feature Third-Mirror Break-Off
(vxassist or vxsnap)
Full-Sized Instant
(vxsnap)
Space-Optimized
Instant (vxsnap)
Immediately available
for use on creation
No Yes Yes
Requires less storage
space than original
volume
No No Yes
Can be reattached to
original volume
Yes Yes No
Can be used to restore
contents of original
volume
Yes
1
Yes
1
Yes
2
Can quickly be
refreshed without being
reattached
No Yes Yes
Snapshot hierarchy can
be split
No Yes
3
No
Can be moved into
separate disk group
from original volume
Yes Yes
3
No
Can be turned into an
independent volume
Yes Yes
3
No
FastResync ability
persists across system
reboots or cluster
restarts
Yes
4
Yes Yes
Synchronization can be
controlled
No Yes No