nbd-client

Langue: en

Autres versions - même langue

Version: 19 april 2006 (mandriva - 22/10/07)

Section: 8 (Commandes administrateur)

Sommaire

NAME

nbd-client - connect to a server running nbd-server(1), to use its exported block device

SYNOPSIS

nbd-client [ bs=blocksize ] host port nbd-device [ -swap ]

nbd-client -d nbd-device

DESCRIPTION

This manual page documents briefly the nbd-client command.

This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page.

With nbd-client, you can connect to a server running nbd-server, thus using raw diskspace from that server as a blockdevice on the local client.

To do this, support from the Linux Kernel is necessary, in the form of the Network Block Device (NBD). When you have that, either in the kernel, or as a module, you can connect to an NBD server and use its exported file through a block special file with major mode 43.

OPTIONS

The following options are supported:

bs=blocksize
Use a blocksize of "blocksize". Default is 1024; allowed values are either 512, 1024, 2048 or 4096
host
The hostname of the machine running nbd-server.
port
The TCP port on which nbd-server is running at the server.
nbd-device
The block special file this nbd-client should connect to.
-swap
Specifies that this NBD device will be used as swapspace. If you intend to do that, please use this option to prevent deadlocks. You'll need a special kernel patch, available at NBD's homepage: http://atrey.karlin.mff.cuni.cz/~pavel

EXAMPLES

Some examples of nbd-client usage:

•
To connect to a server running on port 2000 at host "server.domain.com", using the client's block special file "/dev/nd0":

nbd-client server.domain.com 2000 /dev/nd0

•
To connect to a server running on port 2001 at host "swapserver.domain.com", using the client's block special file "/dev/nd1", for swap purposes:

nbd-client swapserver.domain.com 2001 /dev/nd1 -swap

•
To disconnect the above connection again (after making sure the block special file is not in use anymore):

nbd-client -d /dev/nd1

SEE ALSO

nbd-server (1).

AUTHOR

The NBD kernel module and the NBD tools have been written by Pavel Macheck (pavel@ucw.cz).

The kernel module is now maintained by Paul Clements (Paul.Clements@steeleye.com), while the userland tools are maintained by Wouter Verhelst (wouter@debian.org)

This manual page was written by Wouter Verhelst (<wouter@debian.org>) for the Debian GNU/Linux system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, version 2, as published by the Free Software Foundation.