Operation Manual
4.4.1 Snapshot Metadata
Each snapshot consists of the snapshot itself and some metadata. With Snapper you
can set and modify some metadata. The following metadata is available for each snap-
shot:
• Type: Snapshot type, see Section 4.4.1.1, “Snapshot Types” (page 105) for details.
This data can not be changed.
• Number: Unique number of the snapshot. This data can not be changed.
• Pre Number: Species the number of the corresponding pre snapshot. For snapshots
of type post only. This data can not be changed.
• Description: A description of the snapshot.
• Userdata: An extended description where you can specify custom data in the form
or comma-separated key=value list: reason=testing_stuff, user=tux
• Cleanup-Algorithm: Cleanup-algorithm for the snapshot
4.4.1.1 Snapshot Types
Snapper knows three different types of snapshots: pre, post and single. Physically they
do not differ, but Snapper handles them differently.
pre
Snapshot of a lesystem before a modication. Each pre snapshot has got a cor-
responding post snapshot. Used e.g. for the automatic YaST/zypper snapshots.
post
Snapshot of a lesystem after a modication. Each post snapshot has got a cor-
responding pre snapshot. Used e.g. for the automatic YaST/zypper snapshots.
single
Stand-alone snapshot. Used e.g. for the automatic hourly snapshots. This is the
default type when crating snapshots.
Snapshots/Rollback with Snapper 105