NAME

       nbdkit-null-plugin - nbdkit bitbucket plugin

SYNOPSIS

        nbdkit null [[size=]SIZE]

DESCRIPTION

       "nbdkit-null-plugin" is a null plugin for nbdkit(1).  Everything written to the virtual
       device is discarded, and reads back as zeroes.

       Most NBD consumers will be very confused by this device.  Trying to create filesystems etc
       on it will likely fail badly.  If the client is caching writes locally then you will get
       inconsistent read behaviour.

       The null plugin is also used when probing for installed filters, see "Detect if a filter
       is installed" in nbdkit-probing(1).

PARAMETERS

       [size=]SIZE
           Specify the virtual size of the disk image.

           This parameter is optional.  If omitted then a zero-sized device is created.

           "size=" is a magic config key and may be omitted in most cases.  See "Magic
           parameters" in nbdkit(1).

FILES

       $plugindir/nbdkit-null-plugin.so
           The plugin.

           Use "nbdkit --dump-config" to find the location of $plugindir.

VERSION

       "nbdkit-null-plugin" first appeared in nbdkit 1.2.

SEE ALSO

       nbdkit(1), nbdkit-plugin(3), nbdkit-full-plugin(1), nbdkit-ones-plugin(1),
       nbdkit-pattern-plugin(1), nbdkit-random-plugin(1).  nbdkit-sparse-random-plugin(1),
       nbdkit-zero-plugin(1).

AUTHORS

       Richard W.M. Jones

COPYRIGHT

       Copyright Red Hat

LICENSE

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       permitted provided that the following conditions are met:

       •   Redistributions of source code must retain the above copyright notice, this list of
           conditions and the following disclaimer.

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           conditions and the following disclaimer in the documentation and/or other materials
           provided with the distribution.

       •   Neither the name of Red Hat nor the names of its contributors may be used to endorse
           or promote products derived from this software without specific prior written
           permission.

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