From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Chmielewski Subject: Re: [Scst-devel] [ANNOUNCE]: Comparison of features sets between different SCSI targets (SCST, STGT, IET, LIO) Date: Mon, 06 Apr 2009 11:44:58 +0200 Message-ID: <49D9CF1A.3090702@wpkg.org> References: <49D7AD54.4060408@vlnb.net> <49D7B122.50103@wpkg.org> <49D7B320.4000506@vlnb.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mx03.syneticon.net ([78.111.66.105]:47153 "EHLO mx03.syneticon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755969AbZDFJpF (ORCPT ); Mon, 6 Apr 2009 05:45:05 -0400 In-Reply-To: <49D7B320.4000506@vlnb.net> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Vladislav Bolkhovitin Cc: linux-scsi@vger.kernel.org, iscsitarget-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, stgt@vger.kernel.org, James Bottomley , scst-devel Vladislav Bolkhovitin schrieb: > Tomasz Chmielewski, on 04/04/2009 11:12 PM wrote: >> Vladislav Bolkhovitin schrieb: >>> Hi All, >>> >>> I set up http://scst.sourceforge.net/comparison.html page, which >>> compares features of existing SCSI target subsystems for Linux. The >>> comparison includes SCST, STGT, IET and LIO. >>> >>> I might be not fully correct somewhere, so, if you don't agree with >>> me about some item(s) in the comparison table, please let me know and >>> I will fix that. >> >> Performance is a bit debatable. > > The result "in average" was listed in the comparison. Of course, one > target can be better somewhere, another one somewhere else. That a > nature of storage: it's pretty hard to optimize for all at once. True. > BTW, if I remember correctly your logs, you didn't apply all the SCST > kernel patches on your kernel. Then your results aren't much applicable > to this comparison, because it assumes all SCST kernel patches applied. I made three tests: - STGT (with standard Debian Lenny kernel) - SCST with default build options (i.e. no "make debug2perf"), no kernel patches (standard Debian Lenny kernel) - SCST + "make debug2perf", with kernel patches (Debian Lenny .config + SCST patches and proper option enabled) I'll post the results shortly. -- Tomasz Chmielewski http://wpkg.org