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VOS_MOVE

VOS_MOVE

Section: AFS Command Reference (1) Updated: 2010-12-17
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NAME

vos_move - Moves a read/write volume to another site  

SYNOPSIS

vos move -id <volume name or ID>
    -fromserver <machine name on source>
    -frompartition <partition name on source>
    -toserver <machine name on destination>
    -topartition <partition name on destination>
    [-live] [-cell <cell name>] [-noauth]
    [-localauth] [-verbose] [-help]

vos m -i <volume name or ID>
    -froms <machine name on source>
    -fromp <partition name on source>
    -tos <machine name on destination>
    -top <partition name on destination> [-li]
    [-c <cell name>] [-n] [-l] [-v] [-h]  

DESCRIPTION

The vos move command moves the indicated read/write volume from its current site (specified with the -fromserver and -frompartition arguments) to the destination site (specified with the -toserver and -topartition arguments). This command automatically removes the backup copy from the current site, if it exists. To create a new backup volume at the destination site, use the vos backup command.

This command works on read/write volumes only. To move a read-only volume, use the vos addsite and vos release commands to define a new read-only site and release the volume contents to it, and then use the vos remove command to remove the previous read-only volume's definition from the Volume Location Database (VLDB) and data from the partition. To move a backup volume, use this command to move its read/write source and then issue the vos backup command.

Before executing this command, the vos command interpreter initiates a check that the destination partition contains enough space to house the volume being moved. If there is not enough space, the move operation is not attempted and the following message appears:

   vos: no space on target partition <dest_part> to move volume <volume>

 

CAUTIONS

Unless there is a compelling reason, do not interrupt a vos move command in progress. Interrupting a move can result in one or more of the following inconsistent states:
There are two versions of the volume, one at the source site and one at the destination site. (If this happens, retain the version identified by the VLDB and use the vos zap command to remove the other version.)
The backup version of the volume is stranded at the old site. (If this happens, use the vos zap command to remove it.)
The volume is off-line. (If this happens, run the bos salvage command to bring it back on line.)

If the Ctrl-C interrupt signal is pressed while a vos move operation is executing, the following message warns of the consequences and requests confirmation of the kill signal:

   SIGINT handler: vos move operation in progress
   WARNING: may leave AFS storage and metadata in indeterminate state
   enter second control-c to exit

To confirm termination of the operation, press Ctrl-C a second time; press any other key to continue the operation.

Currently, the maximum size of a volume is 2 terabytes (2^31 bytes) and the maximum size of a /vicepX partition on a fileserver is also 2 terabytes. The fileserver will not report an error when it has access to a partition larger than 2 terabytes, but it will probably fail if the administrator attempts to use more than 2 terabytes of space. In addition, there are reports of erroneous disk usage numbers when vos partinfo or other OpenAFS disk reporting tools are used with partitions larger than 2 terabytes.  

OPTIONS

-id <volume name or ID>
Specifies either the complete name or volume ID number of a read/write volume.
-fromserver <server name>
Identifies the file server machine where the volume currently resides. Provide the machine's IP address or its host name (either fully qualified or using an unambiguous abbreviation). For details, see vos(1).
-frompartition <partition name>
Names the partition where the volume currently resides. Provide the full partition name (for, example, /vicepa) or one of the abbreviated forms described in vos(1).
-toserver <server name>
Identifies the file server machine to which to move the volume. Provide the machine's IP address or its host name (either fully qualified or using an unambiguous abbreviation). For details, see vos(1).
-topartition <partition name>
Names the partition to which to move the volume. Provide the full partition name (for, example, /vicepa) or one of the abbreviated forms described in vos(1).
-live
Avoids making a temporary copy of the volume during the move. This is useful if the partition is full, but the administrator needs to move volumes to a another partition or server to free up disk space. The caveat is that the volume is locked during the entire operation instead of the short time that is needed to make the temporary clone.
-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.
-help
Prints the online help for this command. All other valid options are ignored.
 

EXAMPLES

The following example moves the volume "user.smith" from the /vicepb partition on the file server machine "fs3.abc.com" to the /vicepg partition on the file server machine "fs7.abc.com".

   % vos move -id user.smith -fromserver fs3.abc.com -frompartition b \
       -toserver fs7.abc.com -topartition g

 

PRIVILEGE REQUIRED

The issuer must be listed in the /etc/openafs/server/UserList file on the machines specified with the -toserver and -fromserver arguments 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 ALSO

vos(1), vos_addsite(1), vos_backup(1), vos_copy(1), vos_release(1), vos_listvol(1), vos_remove(1)  

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.


 

Index

NAME
SYNOPSIS
DESCRIPTION
CAUTIONS
OPTIONS
EXAMPLES
PRIVILEGE REQUIRED
SEE ALSO
COPYRIGHT

This document was created by man2html, using the manual pages.
Time: 21:26:51 GMT, April 16, 2011