VOS_BACKUPSYS(1) AFS Command Reference VOS_BACKUPSYS(1)NAMEvos_backupsys - Creates a backup volume for several read/write volumes
SYNOPSIS
vos backupsys [-prefix <common prefix on volume(s)>+]
[-server <machine name>]
[-partition <partition name>]
[-exclude] [-xprefix <negative prefix on volume(s)>+]
[-dryrun] [-cell <cell name>]
[-noauth] [-localauth]
[-verbose] [-encrypt] [-noresolve] [-help]
vos backups [-pr <common prefix on volume(s)>+]
[-s <machine name>] [-pa <partition name>]
[-ex] [-x <negative prefix on volume(s)>+] [-d]
[-c <cell name>] [-noa] [-l] [-v]
[-en] [-nor] [-h]
DESCRIPTION
The vos backupsys command clones each indicated read/write volume to
create a backup version, placing each clone at the same site as its
read/write source version. It assigns each clone the same name as the
read/write source, adding a ".backup" extension. It assigns the volume
ID number already allocated for the backup version in the Volume
Location Database (VLDB). If a backup version already exists for a
given volume, the new clone replaces it.
To clone every read/write volume listed in the VLDB, omit all of the
command's options. Otherwise, combine the command's options to clone
various groups of volumes. The options use one of two basic criteria to
select volumes: location (the -server and -partition arguments) or
presence in the volume name of one of a set of specified character
strings (the -prefix, -exclude, and -xprefix options).
To clone only volumes that reside on one file server machine, include
the -server argument. To clone only volumes that reside on one
partition, combine the -server and -partition arguments. The -partition
argument can also be used alone to clone volumes that reside on the
indicated partition on every file server machine. These arguments can
be combined with those that select volumes based on their names.
Combine the -prefix, -exclude, and -xprefix options (with or without
the -server and -partition arguments) in the indicated ways to select
volumes based on character strings contained in their names:
· To clone every read/write volume at the specified location whose
name includes one of a set of specified character strings (for
example, begins with "user." or includes the string "afs"), use the
-prefix argument or combine the -xprefix and -exclude options.
· To clone every read/write volume at the specified location except
those whose name includes one of a set of specified character
strings, use the -xprefix argument or combine the -prefix and
-exclude options.
· To clone every read/write volume at the specified location whose
name includes one of one of a set of specified character strings,
except those whose names include one of a different set of
specified character strings, combine the -prefix and -xprefix
arguments. The command creates a list of all volumes that match the
-prefix argument and then removes from the list the volumes that
match the -xprefix argument. For effective results, the strings
specified by the -xprefix argument must designate a subset of the
volumes specified by the -prefix argument.
If the -exclude flag is combined with the -prefix and -xprefix
arguments, the command creates a list of all volumes that do not
match the -prefix argument and then adds to the list any volumes
that match the -xprefix argument. As when the -exclude flag is not
used, the result is effective only if the strings specified by the
-xprefix argument designate a subset of the volumes specified by
the -prefix argument.
The -prefix and -xprefix arguments both accept multiple values, which
can be used to define disjoint groups of volumes. Each value can be one
of two types:
· A simple character string, which matches volumes whose name begin
with the string. All characters are interpreted literally (that is,
characters that potentially have special meaning to the command
shell, such as the period, have only their literal meaning).
· A regular expression, which matches volumes whose names contain the
expressions. Place a caret ("^") at the beginning of the
expression, and enclose the entire string in single quotes ('').
Explaining regular expressions is outside the scope of this
reference page; see the UNIX manual page for regexp(5) or (for a
brief introduction) backup_addvolentry(8). As an example, the
following expression matches volumes that have the string "aix"
anywhere in their names:
-prefix '^.*aix'
To display a list of the volumes to be cloned, without actually cloning
them, include the -dryrun flag. To display a statement that summarizes
the criteria being used to select volume, include the -verbose flag.
This command can be used to clone a single read/write volume; specify
its complete name as the -prefix argument. However, it is more
efficient to use the vos backup command, which employs a more
streamlined technique for finding a single volume.
OPTIONS-prefix <common prefix>
Specifies one or more simple character strings or regular
expressions of any length; a volume whose name includes the string
is placed on the set of volumes to be cloned. Include field
separators (such as periods) if appropriate. This argument can be
combined with any combination of the -server, -partition, -exclude,
and -xprefix options.
-server <machine name>
Identifies the file server machine where each read/write source
volume resides. Provide the machine's IP address or its host name
(either fully qualified or using an unambiguous abbreviation). For
details, see vos(1).
This argument can be combined with any combination of the -prefix,
-partition, -exclude, and -xprefix options.
-partition <partition name>
Identifies the partition where each read/write source volume
resides. Provide the partition's complete name with preceding slash
(for example, "/vicepa") or use one of the three acceptable
abbreviated forms. For details, see vos(1).
This argument can be combined with any combination of the -prefix,
-server, -exclude, and -xprefix options.
-exclude
Reverses the meaning of the -prefix or -xprefix argument. This flag
can be combined with any combination of the -prefix, -server,
-partition, and -xprefix options.
-xprefix <negative prefix>
Specifies a simple character string or regular expression of any
length; a volume whose name includes the string is removed from the
set of volumes to be cloned. Include field separators (such as
periods) if appropriate. This argument can be combined with any
combination of the -prefix, -server, -partition, and -exclude
options.
-dryrun
Displays on the standard output stream a list of the volumes to be
cloned, without actually cloning them.
-cell <cell name>
Names the cell in which to run the command. Do not combine this
argument with the -localauth flag. For more details, see vos(1).
-noauth
Assigns the unprivileged identity "anonymous" to the issuer. Do not
combine this flag with the -localauth flag. For more details, see
vos(1).
-localauth
Constructs a server ticket using a key from the local
/usr/afs/etc/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).
-verbose
Produces on the standard output stream a detailed trace of the
command's execution. If this argument is omitted, only warnings and
error messages appear.
-encrypt
Encrypts the command so that the operation's results are not
transmitted across the network in clear text. This option is
available in OpenAFS versions 1.4.11 or later and 1.5.60 or later.
-noresolve
Shows all servers as IP addresses instead of the DNS name. This is
very useful when the server address is registered as 127.0.0.1 or
when dealing with multi-homed servers. This option is available in
OpenAFS versions 1.4.8 or later and 1.5.35 or later.
-help
Prints the online help for this command. All other valid options
are ignored.
OUTPUT
The command generates the following messages on the standard output
stream to confirm that the operation was successful:
done
Total volumes backed up: <number_cloned>; failed to backup: <failures>
If the -dryrun flag is included, a list of the volumes to be backed up
precedes the standard confirmation messages.
If the -verbose flag is included but not the -dryrun flag, the
following messages appear for each volume. The output concludes with
the standard confirmation messages.
Creating backup volume for <volume_name> on <date/time>
{Recloning backup volume | Creating a new backup clone} <backup_volumeID> . . .done
If both the -dryrun and -verbose flags are included, the output begins
with a statement summarizing the criteria being used to select the
volumes, followed by a list of the volumes and the standard
confirmation messages. The format of the criteria summary statement
depends on which other options are provided:
· If only the -prefix argument is provided, or the -xprefix and
-exclude options are combined:
Would have backed up volumes which are prefixed with <string> [or <string>] . .
· If only the -xprefix argument is provided, or the -prefix and
-exclude options are combined:
Would have backed up volumes which are not prefixed with <string> [nor <string>] . .
· If the -prefix and -xprefix arguments are combined:
Would have backed up volumes which are prefixed with <string> [or <string>] \
removing those which are prefixed with <x_string> [or <x_string>] . .
· If the -prefix, -xprefix, and -exclude options are provided:
Would have backed up volumes which are not prefixed with <string> [nor <string>] \
adding those which are prefixed with <x_string> [or <x_string>] . .
EXAMPLES
The following example creates a backup version of every read/write
volume listed in the cell's VLDB whose name begins with the string
user.
% vos backupsys -prefix user
The following example, appropriate in the ABC Corporation cell, creates
a backup version of every read/write volume on the file server machine
"fs3.abc.com".
% vos backupsys -server fs3.abc.com
The following example, appropriate in the State University cell,
creates a backup version of every read/write volume on the file server
machine "db1.stateu.edu" except those whose name includes the string
"temp".
% vos backupsys -server db1.stateu.edu -prefix '^.*temp'
The following example creates a backup version of every volume listed
in the cell's VLDB, excluding those whose names contain the string
"source", but including those whose names contain the string
"source.current".
% vos backupsys -prefix '^.*source' -exclude -xprefix '^.*source\.current'
PRIVILEGE REQUIRED
The issuer must be listed in the /usr/afs/etc/UserList file on the
machine specified with the -server argument and on each database server
machine. If the -localauth flag is included, the issuer must instead be
logged on to a server machine as the local superuser "root".
SEE ALSObackup_addvolentry(8), vos(1), vos_backup(1)
UNIX manual page for regexp(5)COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
This documentation is covered by the IBM Public License Version 1.0.
It was converted from HTML to POD by software written by Chas Williams
and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
OpenAFS 2013-10-09 VOS_BACKUPSYS(1)
