From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: Integration of SCST in the mainstream Linux kernel Date: Mon, 04 Feb 2008 18:04:48 -0500 Message-ID: <47A79A10.4070706@garzik.org> References: <1201639331.3069.58.camel@localhost.localdomain> <47A05CBD.5050803@vlnb.net> <47A7049A.9000105@vlnb.net> <1202139015.3096.5.camel@localhost.localdomain> <47A73C86.3060604@vlnb.net> <1202144767.3096.38.camel@localhost.localdomain> <47A7488B.4080000@vlnb.net> <1202145901.3096.49.camel@localhost.localdomain> <1202151989.11265.576.camel@haakon2.linux-iscsi.org> <20080204224314.113afe7b@core> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:53940 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755619AbYBDXFE (ORCPT ); Mon, 4 Feb 2008 18:05:04 -0500 In-Reply-To: <20080204224314.113afe7b@core> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Alan Cox Cc: Linus Torvalds , "Nicholas A. Bellinger" , James Bottomley , Vladislav Bolkhovitin , Bart Van Assche , Andrew Morton , FUJITA Tomonori , linux-scsi@vger.kernel.org, scst-devel@lists.sourceforge.net, Linux Kernel Mailing List , Mike Christie Alan Cox wrote: >> better. So for example, I personally suspect that ATA-over-ethernet is way >> better than some crazy SCSI-over-TCP crap, but I'm biased for simple and >> low-level, and against those crazy SCSI people to begin with. > > Current ATAoE isn't. It can't support NCQ. A variant that did NCQ and IP > would probably trash iSCSI for latency if nothing else. AoE is truly a thing of beauty. It has a two/three page RFC (say no more!). But quite so... AoE is limited to MTU size, which really hurts. Can't really do tagged queueing, etc. iSCSI is way, way too complicated. It's an Internet protocol designed by storage designers, what do you expect? For years I have been hoping that someone will invent a simple protocol (w/ strong auth) that can transit ATA and SCSI commands and responses. Heck, it would be almost trivial if the kernel had a TLS/SSL implementation. Jeff