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NAME

       vos_dump - Converts a volume into ASCII format and writes it to a file

SYNOPSIS

       vos dump -id <volume name or ID>
           [-time <dump from time>]
           [-file <dump file>] [-server <server>]
           [-partition <partition>] [-clone] [-omitdirs]
           [-cell <cell name>] [-noauth] [-localauth]
           [-verbose] [-encrypt] [-noresolve] [-help]

       vos du -i <volume name or ID>
           [-t <dump from time>]
           [-f <dump file>] [-s <server>]
           [-p <partition>]
           [-cl] [-o] [-ce <cell name>] [-noa] [-l]
           [-v] [-e] [-nor] [-h]

DESCRIPTION

       The vos dump command converts the contents of the indicated volume, which can be read/write, read-only or
       backup, into ASCII format. The Volume Server writes the converted contents to the file named by the -file
       argument, or to the standard output stream. In the latter case, the output can be directed to a named
       pipe, which enables interoperation with third-party backup utilities.

       To dump the complete contents of a volume (create a full dump), omit the -time argument or specify the
       value 0 (zero) for it. To create an incremental dump, which includes only the files and directories in
       the volume that have modification timestamps later than a certain time, specify a date and time as the
       value for the -time argument.

       By default, the vos command interpreter consults the Volume Location Database (VLDB) to learn the
       volume's location, so the -server and -partition arguments are not required. If the -id argument
       identifies a read-only volume that resides at multiple sites, the command dumps the version from just one
       of them (normally, the one listed first in the volume's VLDB entry as reported by the vos examine or vos
       listvldb command). To dump the read-only volume from a particular site, use the -server and -partition
       arguments to specify the site. To bypass the VLDB lookup entirely, provide a volume ID number (rather
       than a volume name) as the value for the -id argument, together with the -server and -partition
       arguments. This makes it possible to dump a volume for which there is no VLDB entry.

       During the dump operation, the volume is inaccessible both to Cache Managers and to other volume
       operations. Dumping a volume does not otherwise affect its status on the partition or its VLDB entry.

       To restore a dumped volume back into AFS, use the vos restore command.

CAUTIONS

       Support for incremental dumps is provided to facilitate interoperation with third-party backup utilities.
       The vos dump command does not provide any of the administrative facilities of an actual backup system, so
       the administrator must keep manual records of dump times and the relationship between full and
       incremental dumps of a volume. For a volume's contents to be consistent after restoration of incremental
       dumps, there must be no gap between the time at which a prior dump of the volume was created and the
       value of the -time argument to the vos dump command that creates the incremental dump. More specifically,
       for a read/write volume, the -time argument must specify the time that the prior dump was performed, and
       for a read-only or backup volume it must specify the time that the volume was last released (using the
       vos release command) or cloned (using the vos backup or vos backupsys command) prior to dumping it. The
       parent dump can be either a full dump or another incremental dump.

OPTIONS

       -id <volume name or ID>
           Specifies either the complete name or volume ID number of the read/write, read-only, or backup volume
           to dump.

       -time <dump from time>
           Specifies whether the dump is full or incremental. Omit this argument to create a full dump, or
           provide one of three acceptable values:

           •   The value 0 (zero) to create a full dump.

           •   A date in the format mm/dd/yyyy (month, day and year) to create an incremental dump that includes
               only files and directories with modification timestamps later than midnight (12:00 a.m.) on the
               indicated date. Valid values for the year range from 1970 to 2037; higher values are not valid
               because the latest possible date in the standard UNIX representation is in 2038. The command
               interpreter automatically reduces later dates to the maximum value. An example is "01/13/1999".

           •   A date and time in the format "mm/dd/yyyy hh:MM" to create an incremental dump that includes only
               files and directories with modification timestamps later than the specified date and time. The
               date format is the same as for a date alone. Express the time as hours and minutes (hh:MM) in
               24-hour format (for example, 20:30 is 8:30 p.m.). Surround the entire expression with double
               quotes ("") because it contains a space.  An example is "01/13/1999 22:30".

       -file <dump file>
           Specifies the pathname of the file to which to write the dump. The file can be in AFS, but not in the
           volume being dumped. A partial pathname is interpreted relative to the current working directory. If
           this argument is omitted, the dump is directed to the standard output stream.

       -server <server name>
           Specifies the file server machine on which the volume resides.  Provide the -partition argument along
           with this one.

       -partition <partition name>
           Specifies the partition on which the volume resides. Provide the -server argument along with this
           one.

       -clone
           Normally, vos dump locks the volume and dumps it, which blocks writes to the volume while the dump is
           in progress.  If this flag is given, vos dump will instead clone the volume first (similar to what
           vos move would do) and then dumps the clone.  This can significantly decrease the amount of time the
           volume is kept locked for dumps of large volumes.

       -omitdirs
           By default, vos dump includes all directory objects in an incremental dump whether they've been
           changed or not.  If this option is given, unchanged directories will be omitted.  This will reduce
           the size of the dump and not cause problems if the incremental is restored, as expected, on top of a
           volume containing the correct directory structure (such as one created by restoring previous full and
           incremental dumps).

       -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 error 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.

EXAMPLES

       The following command writes a full dump of the volume "user.terry" to the file
       /afs/abc.com/common/dumps/terry.dump.

          % vos dump -id user.terry -time 0 -file /afs/abc.com/common/dumps/terry.dump

       The following command writes an incremental dump of the volume "user.smith" to the file
       "smith.990131.dump" in the current working directory. Only those files in the volume with modification
       time stamps later than 6:00 p.m. on 31 January 1999 are included in the dump.

          % vos dump -id user.smith -time "01/31/1999 18:00" -file smith.990131.dump

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".

       If the -file argument is included, the issuer must also have permission to insert and write in the
       directory that houses the file.

SEE ALSO

       restorevol(1), vos(1), vos_examine(1), vos_listvldb(1), vos_restore(1)

       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.