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From: Andreas Dilger <adilger@dilger.ca>
To: Alexey Lyashkov <alexey.lyashkov@gmail.com>
Cc: NeilBrown <neilb@suse.com>,
	Andreas Dilger <andreas.dilger@intel.com>,
	"devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>,
	Oleg Drokin <oleg.drokin@intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Christoph Hellwig <hch@infradead.org>,
	"selinux@tycho.nsa.gov" <selinux@tycho.nsa.gov>,
	fsdevel <linux-fsdevel@vger.kernel.org>,
	lustre-devel <lustre-devel@lists.lustre.org>
Subject: Re: [lustre-devel] [PATCH] staging: lustre: delete the filesystem from the tree.
Date: Sun, 3 Jun 2018 22:15:31 -0600	[thread overview]
Message-ID: <CF1B7A14-3C16-4CD1-8274-C6A3E0065624@dilger.ca> (raw)
In-Reply-To: <FE290581-D17D-4CEC-9AE2-B79DCBBD0823@gmail.com>

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On Jun 3, 2018, at 9:59 PM, Alexey Lyashkov <alexey.lyashkov@gmail.com> wrote:
> 
>> On Sun, Jun 03 2018, Dilger, Andreas wrote:
>> 
>>> LNet is originally based on a high-performance networking stack called
>>> Portals (v3, http://www.cs.sandia.gov/Portals/), with additions for LNet
>>> routing to allow cross-network bridging.
>>> 
>>> A critical part of LNet is that it is for RDMA and not packet-based
>>> messages.  Everything in Lustre is structured around RDMA.  Of course,
>>> RDMA is not possible with TCP
> 
> To be clear. Soft IB (aka Soft RoCE) driver is part of OFED stack from 4.8
> (or 4.9).  So RDMA API now is possible with TCP networks.

Well, strictly speaking RoCE still isn't possible with TCP networks.  RoCE v1
is an Ethernet layer protocol (not IP based), while RoCE v2 is UDP/IP based.

Cheers, Andreas






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WARNING: multiple messages have this Message-ID (diff)
From: Andreas Dilger <adilger@dilger.ca>
To: Alexey Lyashkov <alexey.lyashkov@gmail.com>
Cc: NeilBrown <neilb@suse.com>,
	Andreas Dilger <andreas.dilger@intel.com>,
	"devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>,
	Oleg Drokin <oleg.drokin@intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Christoph Hellwig <hch@infradead.org>,
	"selinux@tycho.nsa.gov" <selinux@tycho.nsa.gov>,
	fsdevel <linux-fsdevel@vger.kernel.org>,
	lustre-devel <lustre-devel@lists.lustre.org>
Subject: [lustre-devel] [PATCH] staging: lustre: delete the filesystem from the tree.
Date: Sun, 3 Jun 2018 22:15:31 -0600	[thread overview]
Message-ID: <CF1B7A14-3C16-4CD1-8274-C6A3E0065624@dilger.ca> (raw)
In-Reply-To: <FE290581-D17D-4CEC-9AE2-B79DCBBD0823@gmail.com>

On Jun 3, 2018, at 9:59 PM, Alexey Lyashkov <alexey.lyashkov@gmail.com> wrote:
> 
>> On Sun, Jun 03 2018, Dilger, Andreas wrote:
>> 
>>> LNet is originally based on a high-performance networking stack called
>>> Portals (v3, http://www.cs.sandia.gov/Portals/), with additions for LNet
>>> routing to allow cross-network bridging.
>>> 
>>> A critical part of LNet is that it is for RDMA and not packet-based
>>> messages.  Everything in Lustre is structured around RDMA.  Of course,
>>> RDMA is not possible with TCP
> 
> To be clear. Soft IB (aka Soft RoCE) driver is part of OFED stack from 4.8
> (or 4.9).  So RDMA API now is possible with TCP networks.

Well, strictly speaking RoCE still isn't possible with TCP networks.  RoCE v1
is an Ethernet layer protocol (not IP based), while RoCE v2 is UDP/IP based.

Cheers, Andreas





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  reply	other threads:[~2018-06-04  4:15 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-01  9:11 [PATCH] staging: lustre: delete the filesystem from the tree Greg Kroah-Hartman
2018-06-01  9:11 ` [lustre-devel] " Greg Kroah-Hartman
2018-06-01 11:41 ` Christoph Hellwig
2018-06-01 11:41   ` [lustre-devel] " Christoph Hellwig
2018-06-01 18:20   ` Andreas Dilger
2018-06-01 18:20     ` [lustre-devel] " Andreas Dilger
2018-06-01 18:25     ` Doug Oucharek
2018-06-01 18:25       ` Doug Oucharek
2018-06-01 23:19       ` NeilBrown
2018-06-01 23:19         ` NeilBrown
2018-06-03 20:34         ` Dilger, Andreas
2018-06-03 20:34           ` Dilger, Andreas
2018-06-04  3:54           ` NeilBrown
2018-06-04  3:54             ` NeilBrown
2018-06-04  3:59             ` Alexey Lyashkov
2018-06-04  3:59               ` Alexey Lyashkov
2018-06-04  4:15               ` Andreas Dilger [this message]
2018-06-04  4:15                 ` Andreas Dilger
2018-06-04  4:17                 ` Alexey Lyashkov
2018-06-04  4:17                   ` Alexey Lyashkov
2018-06-01 18:30 ` Andreas Dilger
2018-06-01 18:30   ` [lustre-devel] " Andreas Dilger
2018-06-01 18:41   ` Oleg Drokin
2018-06-01 18:41     ` [lustre-devel] " Oleg Drokin
2018-06-01 19:08   ` Greg Kroah-Hartman
2018-06-01 19:08     ` [lustre-devel] " Greg Kroah-Hartman
2018-06-04  7:09     ` Christoph Hellwig
2018-06-04  7:09       ` [lustre-devel] " Christoph Hellwig
2018-06-04  7:14       ` Greg Kroah-Hartman
2018-06-04  7:14         ` [lustre-devel] " Greg Kroah-Hartman
2018-06-02  0:28 ` NeilBrown
2018-06-02  0:28   ` NeilBrown

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