The basesnapshotname option
specifies
the snapshot to use as the base snapshot, when you perform a snapshot
differential (snapdiff) backup of a NetApp filer
volume. If you specify this option, you must also use the snapdiff option
or an error occurs. If basesnapshotname is not
specified, the useexistingbase option selects
the most recent snapshot on the filer volume as the base snapshot.
If the specified snapshot cannot be
found, an error is
reported and the backup operation fails.
Supported
Clients
This
option can be used with supported x86_64 Linux and AIX® clients.
This option can be used with supported Windows clients.
Options
File
This option can be specified
in the client options file or on the command line.
Syntax
>>-BASESNAPSHOTName-- --snapshot_name--------------------------><
Parameters
- snapshot_name
- Specifies the name of an existing snapshot to use as the base
snapshot. The name specified can be a snapshot name, such as vol1_snap,
or it can be the name of a scheduled NetApp backup that has a name
like nightly.x, where x is
the sequence number (where nightly.0 is the oldest
snapshot).
- You can also use a pattern with wildcard characters
to select
a snapshot. The wildcard characters can be either of the following:
- *
- An asterisk (*) matches any character.
- ?
- A question mark (?) matches a single
character.
- The wildcards are useful if
your snapshots follow a pattern, such
as including the date or data and time as part of the snapshot name.
For example, a snapshot created on November 12 2012 at 11:10:00 AM
could be saved as UserDataVol_121103111000_snapshot.
The most recent snapshot that matches the pattern is selected as the
existing base. For example, if there are two saved snapshots (UserDataVol_121103111000_snapshot and UserDataVol_121103231000_snapshot,
the UserDataVol_121103231100_snapshot is selected
because it is 12 hours newer than the other snapshot.
-basesnapshotname="UserDataVol_*_snapshot"
- Question marks work well for scheduled backups that follow a consistent
name pattern. This syntax selects the latest "nightly" backup
as the snapshot to use as the existing base.
-basenameshotname="nightly.?"
Examples
- Options file:
basesnapshotname nightly.?
basesnapshotname volum_base_snap
- Command line:
dsmc incr \\DRFiler\UserDataVol_Mirror_Share -snapdiff
-useexistingbase -basesnapshotname="nightly.?"