nbdkit-split-plugin - Man Page

nbdkit plugin to concatenate split files into one disk

Synopsis

 nbdkit split [file=]file1 [[file=]file2 [file=]file3 ...]

Description

nbdkit-split-plugin is a file plugin for nbdkit(1).  One or more filenames may be given using the FILENAME parameter.  These files are logically concatenated into a single disk image.

If you want to add a virtual partition table, see nbdkit-partitioning-plugin(1).

Differences from nbdkit-file-plugin

Normally to serve a single file you should use nbdkit-file-plugin(1).  This plugin differs from nbdkit-file-plugin as follows:

  • nbdkit-file-plugin is faster and more efficient.  It has a fully parallel implementation, and does not have to deal with the complexity of locating the correct file to serve or splitting requests across files.
  • nbdkit-file-plugin allows you to resize the underlying file dynamically.  The underlying files must not be resized when using the split plugin.
  • nbdkit-file-plugin can handle block devices, but the split plugin can only handle plain files.
  • nbdkit-file-plugin handles writes of blocks of zeroes efficiently, but the split plugin cannot.
  • nbdkit-file-plugin can “punch holes” in the backing file in response to a trim request from the client, but the split plugin does not support this.

Parameters

[file=]FILENAME

One or more files to open.  They are logically concatenated in the order they appear on the command line.

This parameter must appear at least once.

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

Files

$plugindir/nbdkit-split-plugin.so

The plugin.

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

Version

nbdkit-split-plugin first appeared in nbdkit 1.2.

See Also

nbdkit(1), nbdkit-plugin(3), nbdkit-file-plugin(1), nbdkit-partitioning-plugin(1).

Authors

Richard W.M. Jones

License

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Referenced By

nbdkit(1), nbdkit-file-plugin(1), nbdkit-partitioning-plugin(1), nbdkit-plugin(3), nbdkit-release-notes-1.18(1).

2020-06-29 nbdkit-1.21.13