From owner-freebsd-fs@FreeBSD.ORG Mon Feb 6 20:41:07 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 37F191065672 for ; Mon, 6 Feb 2012 20:41:07 +0000 (UTC) (envelope-from Kamil.Choudhury@anserinae.net) Received: from cdptpa-omtalb.mail.rr.com (cdptpa-omtalb.mail.rr.com [75.180.132.120]) by mx1.freebsd.org (Postfix) with ESMTP id E89238FC1A for ; Mon, 6 Feb 2012 20:41:06 +0000 (UTC) Received: from hrndva-omtalb.mail.rr.com ([10.128.143.53]) by hrndva-qmta01.mail.rr.com with ESMTP id <20120206183612704.MOWC11472@hrndva-qmta01.mail.rr.com>; Mon, 6 Feb 2012 18:36:12 +0000 X-Authority-Analysis: v=2.0 cv=fNy7LOme c=1 sm=0 a=qe0RvMpo0P4Rp0DQO452oA==:17 a=WWGGoYozHbgA:10 a=kj9zAlcOel0A:10 a=xqWC_Br6kY4A:10 a=w-boLisARSGk8YcPp9QA:9 a=CjuIK1q_8ugA:10 a=qe0RvMpo0P4Rp0DQO452oA==:117 X-Cloudmark-Score: 0 X-Originating-IP: 68.173.236.44 Received: from [68.173.236.44] ([68.173.236.44:62294] helo=janus.anserinae.net) by hrndva-oedge03.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 73/14-11045-55D103F4; Mon, 06 Feb 2012 18:35:06 +0000 Received: from JANUS.anserinae.net ([fe80::192c:4b89:9fe9:dc6d]) by janus.anserinae.net ([fe80::192c:4b89:9fe9:dc6d%11]) with mapi; Mon, 6 Feb 2012 13:34:55 -0500 From: Kamil Choudhury To: Michael Fuckner , Daniel Kalchev Thread-Topic: HPC and zfs. Thread-Index: AQHM5OoWn6a1UqnBhUSVAefkkYKv3pYwYOwAgAAFh4CAAAwKAIAAAsCAgAAMOID//6z9hA== Date: Mon, 6 Feb 2012 18:34:51 +0000 Message-ID: <3CEE2DA4348D944399A67E308B78D38A057C6E3E@janus.anserinae.net> References: <4F2FF72B.6000509@pean.org> <20120206162206.GA541@icarus.home.lan> <4F300CEA.5000901@fuckner.net> <413B1A6F-B076-4F50-90EA-7E17CF4B6E36@digsys.bg>, <4F301979.6090302@fuckner.net> In-Reply-To: <4F301979.6090302@fuckner.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Cc: "freebsd-fs@freebsd.org" Subject: RE: HPC and zfs. X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Feb 2012 20:41:07 -0000 > zfs send to a second machine?=0A= =0A= Is there not likely to be a degradation in performance while doing the back= up? =0A= =0A= ...which ties into something that I think is missing from this thread: a st= atement of what this massive =0A= pool of storage is going to be used for. "HPC" is a pretty broad term, and = isn't quite a specification in =0A= my book. =0A= =0A= I have faith that the relevant BSD technologies can be cobbled together to = get OP to the performance=0A= level he needs, but -- and perhaps I have failed basic reading comprehensio= n here -- I don't think we =0A= have a clear enough picture of what that level actually /is/ to offer advic= e on what is almost certainly=0A= going to be a multi-million dollar installation! =0A= =0A= KC=