From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ric Wheeler <rwheeler@redhat.com>
Subject: Re: [RFC] extending splice for copy offloading
Date: Mon, 30 Sep 2013 16:08:48 -0400
Message-ID: <5249DA50.5060105@redhat.com>
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Cc: "Myklebust, Trond" <Trond.Myklebust@netapp.com>,
	Miklos Szeredi <miklos@szeredi.hu>,
	"J. Bruce Fields" <bfields@fieldses.org>,
	Zach Brown <zab@redhat.com>,
	Anna Schumaker <schumaker.anna@gmail.com>,
	Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux-Fsdevel <linux-fsdevel@vger.kernel.org>,
	"linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>,
	"Schumaker, Bryan" <Bryan.Schumaker@netapp.com>,
	"Martin K. Petersen" <mkp@mkp.net>, Jens Axboe <axboe@kernel.dk>,
	Mark Fasheh <mfasheh@suse.com>,
	Joel Becker <jlbec@evilplan.org>,
	Eric Wong <normalperson@yhbt.net>
To: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de>
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On 09/30/2013 04:00 PM, Bernd Schubert wrote:
> pNFS, FhGFS, Lustre, Ceph, etc., all of them shall implement their own 
> interface? And userspace needs to address all of them differently? 

The NFS and SCSI groups have each defined a standard which Zach's proposal 
abstracts into a common user API.

Distributed file systems tend to be rather unique and do not have similar 
standard bodies, but a lot of them could hide server specific implementations 
under the current proposed interfaces.

What is not a good idea is to drag out the core, simple copy offload discussion 
for another 5 years to pull in every odd use case :)

ric