Filter
Top Products
337Administering volume snapshots
Creating instant snapshots
Note: This command is similar in usage to the vxassist snapabort command.
If a volume set name is specified instead of a volume, a mirror is removed from
each volume in the volume set.
Removing a linked break-off snapshot volume
To remove a linked break-off snapshot volume from a volume, use this
command:
# vxsnap [-g diskgroup] rmmir volume|volume_set mirvol=snapvol \
[mirdg=snapdiskgroup]
The mirvol and optional mirdg attributes specify the snapshot volume, snapvol,
and its disk group, snapdiskgroup. For example, the following command
removes a linked snapshot volume, prepsnap, from the volume, vol1:
# vxsnap -g mydg rmmir vol1 mirvol=prepsnap mirdg=mysnapdg
Adding a snapshot to a cascaded snapshot hierarchy
To create a snapshot and push it onto a snapshot hierarchy between the original
volume and an existing snapshot volume, specify the name of the existing
snapshot volume as the value of the infrontof attribute to the
vxsnap make
command. The following example shows how to place the space-optimized
snapshot, thurs_bu, of the volume, dbvol, in front of the earlier snapshot,
wed_bu:
# vxsnap -g dbdg make source=dbvol/newvol=thurs_bu/\
infrontof=wed_bu/cache=dbdgcache
Similarly, the next snapshot that is taken, fri_bu, is placed in front of
thurs_bu:
# vxsnap -g dbdg make source=dbvol/newvol=fri_bu/\
infrontof=thurs_bu/cache=dbdgcache
For more information on the application of cascaded snapshots, see “Cascaded
snapshots” on page 312.
Refreshing an instant snapshot
Refreshing an instant snapshot replaces it with another point-in-time copy of a
parent volume. To refresh one or more snapshots and make them immediately
available for use, use the following command:
# vxsnap [-g diskgroup] refresh snapvolume|snapvolume_set \
source=volume|volume_set [[snapvol2 source=vol2]...] \
[syncing=yes|no]
If the source volume is not specified, the immediate parent of the snapshot is
used. For full-sized instant snapshots, resynchronization is started by default.