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Version: 2007-12-25 (debian - 07/07/09)

Section: 1 (Commandes utilisateur)


vos_size - Computes the size of a volume dump


vos size [-cell <cell name>] [-dump]
    [-encrypt] [-help] [-id] <volume name or id>
    [-localauth] [-noauth]
    [-partition <partition name>]
    [-server <machine name>]
    [-time <dump from time>] [-verbose]


The vos size command shows the size of a volume's dump for backup purposes. The size of the dump may differ from the volume size as reported by vos examine or fs listquota. The size is shown in bytes.

This command is intended for use with backup systems that want to size volume dumps before performing them (to optimize use of tape resources, for example).


-cell <cell name>
The cell in which the volume resides, if it's not in the current cell.
Show the size of the volume dump for the specified volume. Currently, this flag should always be given for vos size to give useful information. It is present to allow this command to provide other size estimates in the future.
Encrypt the command.
Prints the online help for this command. All other valid options are ignored.
-id <volume name or id>
Specifies either the complete name or volume ID number of the read/write, read-only, or backup volume to size.
Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. The vos command interpreter presents it to the Volume Server and Volume Location Server during mutual authentication. Do not combine this flag with the -cell argument or -noauth flag. For more details, see vos(1).
Assigns the unprivileged identity anonymous to the issuer. Do not combine this flag with the -localauth flag. For more details, see vos(1).
-partition <partition name>
Specifies the partition on which the volume resides. Provide the -server argument along with this one.
-server <machine name>
Specifies the file server machine on which the volume resides. Provide the -partition argument along with this one.
-time <dump from time>
Specifies whether the dump is full or incremental. Omit this argument to size a full dump. See vos_dump(1) for the valid values for this option.
Show more output about what's going on.


When run without -verbose, the output will be:
    Volume: <volume>
    dump_size: <size>

where <volume> is the name of the volume and <size> is the size of the dump in bytes. With -verbose, additional status messages will be printed between those two lines.


Sizing a single user volume:
    % vos size user.thoron -dump
    Volume: user.thoron
    dump_size: 36430

or, more verbosely:

    % vos size user.thoron -dump -verbose
    Volume: user.thoron
    Starting transaction on volume 2003434023... done
    Getting size of volume on volume 2003434023... done
    Ending transaction on volume 2003434023... done
    dump_size: 36430

Sizing an incremental dump for the same volume:

    % vos size -id user.thoron -time '05/04/2007 00:00:00' -dump 
    Volume: user.thoron
    dump_size: 21095


The issuer must be listed in the /etc/openafs/server/UserList file on the machine specified with the -server argument or the machine on which the volume is located if -server was not given. If the -localauth flag is included, the issuer must instead be logged on to a server machine as the local superuser "root".


fs_listquota(1), vos_dump(1), vos_examine(1) Copyright 2007 Jason Edgecombe <>

This documentation is covered by the BSD License as written in the doc/LICENSE file. This man page was written by Jason Edgecombe for OpenAFS.


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