vos_backupsys - Online in the Cloud

PROGRAM:

NAME

vos_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 /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).

-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 /etc/openafs/server/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".

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