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From: Josef Bacik <jbacik@fb.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: <axboe@fb.com>, <linux-block@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <kernel-team@fb.com>,
	<nbd-general@lists.sourceforge.net>, <w@uter.be>,
	<hch@infradead.org>
Subject: Re: [PATCH][V2] nbd: add multi-connection support
Date: Fri, 7 Oct 2016 16:43:10 -0400	[thread overview]
Message-ID: <1af1b85a-6d14-b9b3-69b6-96444fccd187@fb.com> (raw)
In-Reply-To: <20161007183656.GE19976@amd>

On 10/07/2016 02:36 PM, Pavel Machek wrote:
> On Thu 2016-09-15 10:43:54, Josef Bacik wrote:
>> NBD can become contended on its single connection.  We have to serialize all
>> writes and we can only process one read response at a time.  Fix this by
>> allowing userspace to provide multiple connections to a single nbd device.  This
>> coupled with block-mq drastically increases performance in multi-process cases.
>> Thanks,
>>
>> Signed-off-by: Josef Bacik <jbacik@fb.com>
>
> Idea is that it can now use multiple CPUs concurrently...?
>
> Do you have a diff for the nbd-server, too?
> 									Pavel
>

nbd-server doesn't need anything special, it just works.  I have a patch for 
nbd-client so you can open multiple connections to setup the NBD device.  You 
can find my patches for the userspace stuff here

https://github.com/josefbacik/nbd

Thanks,

Josef

      reply	other threads:[~2016-10-07 20:45 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-15 14:43 Josef Bacik
2016-10-07 18:36 ` Pavel Machek
2016-10-07 20:43   ` Josef Bacik [this message]

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