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From: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
To: Jeff Garzik <jeff@garzik.org>
Cc: Vladislav Bolkhovitin <vst@vlnb.net>,
	Alan Cox <alan@lxorguk.ukuu.org.uk>,
	Mike Christie <michaelc@cs.wisc.edu>,
	linux-scsi@vger.kernel.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	James Bottomley <James.Bottomley@HansenPartnership.com>,
	scst-devel@lists.sourceforge.net,
	Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>,
	Julian Satran <Julian_Satran@il.ibm.com>
Subject: Re: Integration of SCST in the mainstream Linux kernel
Date: Tue, 05 Feb 2008 16:17:10 -0800	[thread overview]
Message-ID: <1202257030.2220.90.camel@haakon2.linux-iscsi.org> (raw)
In-Reply-To: <47A8B510.8000807@garzik.org>

On Tue, 2008-02-05 at 14:12 -0500, Jeff Garzik wrote:
> Vladislav Bolkhovitin wrote:
> > Jeff Garzik wrote:
> >> iSCSI is way, way too complicated. 
> > 
> > I fully agree. From one side, all that complexity is unavoidable for 
> > case of multiple connections per session, but for the regular case of 
> > one connection per session it must be a lot simpler.
> 
> 
> Actually, think about those multiple connections...  we already had to 
> implement fast-failover (and load bal) SCSI multi-pathing at a higher 
> level.  IMO that portion of the protocol is redundant:   You need the 
> same capability elsewhere in the OS _anyway_, if you are to support 
> multi-pathing.
> 
> 	Jeff
> 
> 

Hey Jeff,

I put a whitepaper on the LIO cluster recently about this topic.. It is
from a few years ago but the datapoints are very relevant.

http://linux-iscsi.org/builds/user/nab/Inter.vs.OuterNexus.Multiplexing.pdf

The key advantage to MC/S and ERL=2 has always been that they are
completely OS independent.  They are designed to work together and
actually benefit from one another.

They are also are protocol independent between Traditional iSCSI and
iSER.

--nab

PS: A great thanks for my former colleague Edward Cheng for putting this
together.

> 
> 


  parent reply	other threads:[~2008-02-06  0:17 UTC|newest]

Thread overview: 147+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-23 14:22 Bart Van Assche
2008-01-23 17:11 ` Vladislav Bolkhovitin
2008-01-29 20:42 ` James Bottomley
2008-01-29 21:31   ` Roland Dreier
2008-01-29 23:32     ` FUJITA Tomonori
2008-01-30  1:15       ` [Scst-devel] " Vu Pham
2008-01-30  8:38       ` Bart Van Assche
2008-01-30 10:56         ` FUJITA Tomonori
2008-01-30 11:40           ` Vladislav Bolkhovitin
2008-01-30 13:10           ` Bart Van Assche
2008-01-30 13:54             ` FUJITA Tomonori
2008-01-31  7:48               ` Bart Van Assche
2008-01-31 13:25           ` Nicholas A. Bellinger
2008-01-31 14:34             ` Bart Van Assche
2008-01-31 14:44               ` Nicholas A. Bellinger
2008-01-31 15:50               ` Vladislav Bolkhovitin
2008-01-31 16:25                 ` [Scst-devel] " Joe Landman
2008-01-31 17:08                   ` Bart Van Assche
2008-01-31 17:13                     ` Joe Landman
2008-01-31 18:12                     ` David Dillow
2008-02-01 11:50                       ` Vladislav Bolkhovitin
2008-02-01 11:50                     ` Vladislav Bolkhovitin
2008-02-01 12:25                       ` Vladislav Bolkhovitin
2008-01-31 17:14                 ` Nicholas A. Bellinger
2008-01-31 17:40                   ` Bart Van Assche
2008-01-31 18:15                     ` Nicholas A. Bellinger
2008-02-01  9:08                       ` Bart Van Assche
2008-02-01  8:11             ` Bart Van Assche
2008-02-01 10:39               ` Nicholas A. Bellinger
2008-02-01 11:04                 ` Bart Van Assche
2008-02-01 12:05                   ` Nicholas A. Bellinger
2008-02-01 13:25                     ` Bart Van Assche
2008-02-01 14:36                       ` Nicholas A. Bellinger
2008-01-30 16:34         ` James Bottomley
2008-01-30 16:50           ` Bart Van Assche
2008-02-02 15:32           ` Pete Wyckoff
2008-02-05 17:01         ` Erez Zilber
2008-02-06 12:16           ` Bart Van Assche
2008-02-06 16:45             ` Benny Halevy
2008-02-06 17:06             ` Roland Dreier
2008-02-18  9:43             ` Erez Zilber
2008-02-18 11:01               ` Bart Van Assche
2008-02-20  7:34                 ` Erez Zilber
2008-02-20  8:41                   ` Bart Van Assche
2008-01-30 11:18       ` Vladislav Bolkhovitin
2008-01-30  8:29   ` Bart Van Assche
2008-01-30 16:22     ` James Bottomley
2008-01-30 17:03       ` Bart Van Assche
2008-02-05  7:14       ` [Scst-devel] " Tomasz Chmielewski
2008-02-05 13:38         ` FUJITA Tomonori
2008-02-05 16:07           ` Tomasz Chmielewski
2008-02-05 16:21             ` Ming Zhang
2008-02-05 16:43             ` FUJITA Tomonori
2008-02-05 17:09           ` Matteo Tescione
2008-02-06  1:29             ` FUJITA Tomonori
2008-02-06  2:01               ` Nicholas A. Bellinger
2008-01-30 11:17   ` Vladislav Bolkhovitin
2008-02-04 12:27     ` Vladislav Bolkhovitin
2008-02-04 13:53       ` Bart Van Assche
2008-02-04 17:00         ` David Dillow
2008-02-04 17:08         ` Vladislav Bolkhovitin
2008-02-05 16:25         ` Bart Van Assche
2008-02-05 18:18           ` Linus Torvalds
2008-02-04 15:30       ` James Bottomley
2008-02-04 16:25         ` Vladislav Bolkhovitin
2008-02-04 17:06           ` James Bottomley
2008-02-04 17:16             ` Vladislav Bolkhovitin
2008-02-04 17:25               ` James Bottomley
2008-02-04 17:56                 ` Vladislav Bolkhovitin
2008-02-04 18:22                   ` James Bottomley
2008-02-04 18:38                     ` Vladislav Bolkhovitin
2008-02-04 18:54                       ` James Bottomley
2008-02-05 18:59                         ` Vladislav Bolkhovitin
2008-02-05 19:13                           ` James Bottomley
2008-02-06 18:07                             ` Vladislav Bolkhovitin
2008-02-07 13:13                             ` [Scst-devel] " Bart Van Assche
2008-02-07 13:45                               ` Vladislav Bolkhovitin
2008-02-07 22:51                                 ` david
2008-02-08 10:37                                   ` Vladislav Bolkhovitin
2008-02-09  7:40                                     ` david
2008-02-08 11:33                                   ` Nicholas A. Bellinger
2008-02-08 14:36                                     ` Vladislav Bolkhovitin
2008-02-08 23:53                                       ` Nicholas A. Bellinger
2008-02-15 15:02                                 ` Bart Van Assche
2008-02-07 15:38                               ` [Scst-devel] " Nicholas A. Bellinger
2008-02-07 20:37                                 ` Luben Tuikov
2008-02-08 10:32                                   ` Vladislav Bolkhovitin
2008-02-09  7:32                                     ` Luben Tuikov
2008-02-11 10:02                                       ` Vladislav Bolkhovitin
2008-02-08 11:53                                   ` [Scst-devel] " Nicholas A. Bellinger
2008-02-08 14:42                                     ` Vladislav Bolkhovitin
2008-02-09  0:00                                       ` Nicholas A. Bellinger
2008-02-04 18:29                 ` Linus Torvalds
2008-02-04 18:49                   ` James Bottomley
2008-02-04 19:06                   ` Nicholas A. Bellinger
2008-02-04 19:19                     ` Nicholas A. Bellinger
2008-02-04 19:44                     ` Linus Torvalds
2008-02-04 20:06                       ` [Scst-devel] " 4news
2008-02-04 20:24                       ` Nicholas A. Bellinger
2008-02-04 21:01                       ` J. Bruce Fields
2008-02-04 21:24                         ` Linus Torvalds
2008-02-04 22:00                           ` Nicholas A. Bellinger
2008-02-04 22:57                           ` Jeff Garzik
2008-02-04 23:45                             ` Linus Torvalds
2008-02-05  0:08                               ` Jeff Garzik
2008-02-05  1:20                                 ` Linus Torvalds
2008-02-05  8:38                             ` Bart Van Assche
2008-02-05 17:50                               ` Jeff Garzik
2008-02-06 10:22                                 ` Bart Van Assche
2008-02-06 14:21                                   ` Jeff Garzik
2008-02-05 13:05                             ` Olivier Galibert
2008-02-05 18:08                               ` Jeff Garzik
2008-02-05 19:01                           ` Vladislav Bolkhovitin
2008-02-04 22:43                       ` Alan Cox
2008-02-04 17:30                         ` Douglas Gilbert
2008-02-05  2:07                           ` [Scst-devel] " Chris Weiss
2008-02-05 14:19                             ` FUJITA Tomonori
2008-02-04 22:59                         ` Nicholas A. Bellinger
2008-02-04 23:00                         ` James Bottomley
2008-02-04 23:12                           ` Nicholas A. Bellinger
2008-02-04 23:16                             ` Nicholas A. Bellinger
2008-02-05 18:37                             ` James Bottomley
2008-02-04 23:04                         ` Jeff Garzik
2008-02-04 23:27                           ` Linus Torvalds
2008-02-05 19:01                           ` Vladislav Bolkhovitin
2008-02-05 19:12                             ` Jeff Garzik
2008-02-05 19:21                               ` Vladislav Bolkhovitin
2008-02-06  0:11                                 ` Nicholas A. Bellinger
2008-02-06  1:43                                   ` Nicholas A. Bellinger
2008-02-12 16:05                                   ` [Scst-devel] " Bart Van Assche
2008-02-13  3:44                                     ` Nicholas A. Bellinger
2008-02-13  6:18                                       ` CONFIG_SLUB and reproducable general protection faults on 2.6.2x Nicholas A. Bellinger
2008-02-13 16:37                                         ` Nicholas A. Bellinger
2008-02-06  0:17                               ` Nicholas A. Bellinger [this message]
2008-02-06  0:48                             ` Integration of SCST in the mainstream Linux kernel Nicholas A. Bellinger
2008-02-06  0:51                               ` Nicholas A. Bellinger
2008-02-05  0:07                         ` Matt Mackall
2008-02-05  0:24                           ` Linus Torvalds
2008-02-05  0:42                             ` Jeff Garzik
2008-02-05  0:45                             ` Matt Mackall
2008-02-05  4:43                             ` [Scst-devel] " Matteo Tescione
2008-02-05  5:07                               ` James Bottomley
2008-02-05 13:38                               ` FUJITA Tomonori
2008-02-05 19:00                       ` Vladislav Bolkhovitin
2008-02-05 17:10 ` Erez Zilber
2008-02-05 19:02   ` Bart Van Assche
2008-02-05 19:02   ` Vladislav Bolkhovitin

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