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fssnap(8)

fssnap(8)               System Administration Commands               fssnap(8)

NAME
       fssnap - create temporary snapshots of a file system

SYNOPSIS
       fssnap [-F FSType] [-V] -o special_options /mount/point


       fssnap  -d [-F  FSType] [-V] /mount/point | dev


       fssnap -i [-F FSType] [-V] [-o special_options]
            [/mount/point | dev]

DESCRIPTION
       The  fssnap command creates a stable, read-only snapshot of a file sys‐
       tem when given either an active mount point or a  special  device  con‐
       taining  a mounted file system, as in the first form of the synopsis. A
       snapshot is a temporary image of a file system intended for backup  op‐
       erations.


       While the snapshot file system is stable and consistent, an application
       updating  files when the snapshot is created might leave these files in
       an internally inconsistent, truncated, or otherwise unusable state.  In
       such  a case, the snapshot will contain these partially written or cor‐
       rupted files. It is a good idea to ensure active applications are  sus‐
       pended  or  checkpointed and their associated files are also consistent
       during snapshot creation.


       File access times are not updated while the snapshot is being created.


       A path to the virtual device that contains this snapshot is printed  to
       standard output when a snapshot is created.

OPTIONS
       The following options are supported:

       -d                    Deletes  the  snapshot  associated with the given
                             file system.


       -F FSType             Specifies the file system type to  be  used.  The
                             FSType  should either be specified here or be de‐
                             termined by matching  the  block  special  device
                             with  an  entry  in  the /etc/vfstab table, or by
                             consulting /etc/default/fs.


       -i                    Displays the state of any given FSType  snapshot.
                             If  a  mount-point or device is not given, a list
                             of all snapshots on the system is displayed. When
                             a mount-point or device  is  specified,  detailed
                             information  is  provided  for the specified file
                             system snapshot by default. The format and  mean‐
                             ing of this information is file-system dependent.
                             See  the  FSType-specific fssnap man page for de‐
                             tails.


       -o special_options    See the FSType-specific man page for fssnap.


       -V                    Echoes the complete command line,  but  does  not
                             execute the command.


OPERANDS
       The following operands are supported:

       /mount/point    The directory where the file system resides.


EXAMPLES
       See FSType-specific man pages for examples.

EXIT STATUS
       The following exit values are returned:

       0     Successful completion.


       >0    An error occurred.


FILES
       /etc/vfstab        Specifies file system type.


       /etc/default/fs    Specifies the default local file system type.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:

       tab()  box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
       TRIBUTE VALUE _ Availabilitysystem/core-os


SEE ALSO
       attributes(7), fssnap_ufs(8)

NOTES
       This command might not be supported for all FSTypes.

Oracle Solaris 11.4               11 Aug 2004                        fssnap(8)
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