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nbdkit-release-notes-1.14(1)	    NBDKIT	  nbdkit-release-notes-1.14(1)

NAME
       nbdkit-release-notes-1.14 - release notes for nbdkit 1.14

DESCRIPTION
       These are the release notes for nbdkit stable release 1.14.  This
       describes the major changes since 1.12.

       nbdkit 1.14.0 was released on 28th August 2019.

   New features
       Server performance improvements:	Nagleas	algorithm is disabled; instead
       "MSG_MORE" is used to control when outgoing packets are sent.  Ramdisk
       plugins now support more	efficient zeroing.  (Eric Blake).

       Plugins can now select their thread model at run	time.  Thread model
       selection is not	finalized until	after the config stage (Eric Blake).

       The server supports "NBD_CMD_CACHE" for prefetching.  Plugins and
       filters have been updated to implement this where it makes sense	(Eric
       Blake).

       Low level pthread lock failures now call	abort(3).  This	should never
       happen in real situations (Eric Blake).

       The server will not advertize multi-conn	support	if the internal	thread
       model is	serialized, avoiding a possible	deadlock in some clients (Eric
       Blake).

       New server option --no-sr can be	used to	disable	structured replies
       (Eric Blake).

       The server will now refuse to start if stdin/stdout/stderr are closed,
       to avoid	potential issues with file descriptor handling in plugins
       (Eric Blake).

       $uri can	be used	to specify an NBD URI in --run parameters (Eric
       Blake).

       New nbdkit-stats-filter(1) displays elapsed statistics about NBD
       operations, such	as the number of bytes read and	written.

       New nbdkit-nocache-filter(1) which disables cache requests, used	to
       determine how effective they are	(Eric Blake).

       New nbdkit-noparallel-filter(1) which can be used to override the
       pluginas	own choice of thread model.  Used to determine how the thread
       model affects performance, or to	serialize plugins if required (Eric
       Blake).

       New nbdkit-cacheextents-filter(1) to cache extents requests, especially
       useful with VDDK	which has a slow implementation	of extents (Martin
       Kletzander).

       In nbdkit-full-plugin(1), nbdkit-memory-plugin(1),
       nbdkit-null-plugin(1), nbdkit-pattern-plugin(1) and
       nbdkit-random-plugin(1),	the "size=" prefix can be omitted, ie:
       "nbdkitA	memoryA	1G" (instead of	"size=1G").

       nbdkit-nbd-plugin(1) has	multiple enhancements (all added by Eric
       Blake):

       o   It may be built using libnbd	instead	of constructing	raw NBD
	   packets.

       o   "NBD_OPT_GO"	is supported.

       o   Add structured reads.

       o   Implement "NBD_CMD_BLOCK_STATUS".

       o   Supports TCP	sockets.

       o   Forwards "NBD_CMD_CACHE".

       o   Retry connections.

       o   Shared connections.

       o   Magic "uri" parameter.

       o   TLS support.

       nbdkit-vddk-plugin(1) now reports hole extents correctly	when using the
       "single-link" flag (Martin Kletzander).

       nbdkit-cache-filter(1) and nbdkit-cow-filter(1) now avoid copying data
       through a bounce	buffer when it is already sufficiently aligned (Eric
       Blake).

       Filters (such as	nbdkit-delay-filter(1) and nbdkit-rate-filter(1))
       which sleep no longer cause long	delays when the	server is shut down
       (Eric Blake).

       Multiple	fixes to nbdkit-rust-plugin(1) (Martin Kletzander).

       Multiple	enhancements and clean ups to the test suite which should make
       tests better and	more reliable.

       OCaml plugins can now use "parse_size", "parse_bool", "read_password"
       calls, and there	is also	a new example plugin.

       On platforms which lack atomic "O_CLOEXEC" support the most serialized
       thread model is always selected to avoid	leaking	file descriptors (Eric
       Blake).

SEE ALSO
       nbdkit(1),
       https://www.redhat.com/archives/libguestfs/2019-August/msg00375.html.

AUTHORS
       Eric Blake

       Richard W.M. Jones

COPYRIGHT
       Copyright (C) 2019 Red Hat Inc.

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

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

       o   Redistributions in binary form must reproduce the above copyright
	   notice, this	list of	conditions and the following disclaimer	in the
	   documentation and/or	other materials	provided with the
	   distribution.

       o   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.

       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.

nbdkit-1.20.4			  2021-09-21	  nbdkit-release-notes-1.14(1)

NAME | DESCRIPTION | SEE ALSO | AUTHORS | COPYRIGHT | LICENSE

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