From owner-freebsd-geom@FreeBSD.ORG Mon Jan 22 07:38:54 2007 Return-Path: X-Original-To: freebsd-geom@freebsd.org Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id E114316A403 for ; Mon, 22 Jan 2007 07:38:54 +0000 (UTC) (envelope-from adamsch1@yahoo.com) Received: from web31814.mail.mud.yahoo.com (web31814.mail.mud.yahoo.com [68.142.206.167]) by mx1.freebsd.org (Postfix) with SMTP id AA4B613C428 for ; Mon, 22 Jan 2007 07:38:54 +0000 (UTC) (envelope-from adamsch1@yahoo.com) Received: (qmail 9974 invoked by uid 60001); 22 Jan 2007 07:12:13 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=d5IDtTYH8ecDigUa0OR3QElYl7ol3OVSAphTqn1CmuPLZc8JRdyF/ssu1PNPXyaaRrxDtP8D0GQy7jixKmII1aOzq8yTrUbSqa8Iv9MMVOFeYtu32ujYxhXIAVjvJ5ilfTRzyhR5nEBoH/YUXk7R23Rdpq5g1sy3EUzdM4HxR9E=; X-YMail-OSG: lFiLSAUVM1mcBn_mHhM2GWHkV7gWzkuqMjcfNXnerj0RrIBeLXWvTP8rzTMbn9pP0hPIQdg6cXyr8CUq51yy0G9clLW3EaAO3FVyjBcb3QHWvuWFTdY- Received: from [69.236.88.234] by web31814.mail.mud.yahoo.com via HTTP; Sun, 21 Jan 2007 23:12:13 PST X-Mailer: YahooMailRC/368.3 YahooMailWebService/0.6.132.7 Date: Sun, 21 Jan 2007 23:12:13 -0800 (PST) From: Shane Adams To: Eric Anderson , Soeren Straarup MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Message-ID: <751291.8910.qm@web31814.mail.mud.yahoo.com> Cc: freebsd-geom@freebsd.org Subject: Re: A beginner project X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Jan 2007 07:38:55 -0000 I've thought about geom snapshots, which I take it you would do at a block = layer similarly to how snapshots are implemented in FFS. I couldnt figure = out a way to do it effeciently. I've found the FFS snapshots do not work w= ell with large disk sets, there is a noticable lag and almost a freeze-up o= n my computer. =0A=0ASeems you'd need to do it at the filesystem layer, an= d as a side effect change the format of inodes at cylinder groups in order = to track changes.=0A=0AIs there any publish literature on the subject?=0A= =0AOh - by snapshot I mean something that can be mounted simlultaniously wi= th the original filesystem.=0A=0ACheers,=0A Shane=0A=0A=0A=0A=0A----- Orig= inal Message ----=0AFrom: Eric Anderson =0ATo: Soere= n Straarup =0ACc: freebsd-geom@freebsd.org=0ASent: Sunday, Ja= nuary 21, 2007 10:16:22 PM=0ASubject: Re: A beginner project=0A=0AOn 01/20/= 07 01:31, Soeren Straarup wrote:=0A> What would be a beignner project withi= n geom?=0A> =0A> Something is acutally going to be used by atleat some.=0A>= =0A> I have briefly looked at:=0A> http://www.freebsd.org/projects/ideas/#= p-psched=0A> =0A> But are there already someone out there that is working o= n it?=0A> =0A> /Soeren=0A> =0A=0AMake a 'geom taste' function?=0A=0AOther i= deas:=0A- geom snapshots (harder!)=0A- gnop additional options (add latency= , etc, to mimic real devices)=0A=0A=0AEric=0A=0A=0A=0A-- =0A---------------= ---------------------------------------------------------=0AEric Anderson = Sr. Systems Administrator Centaur Technology=0AAn undefined pr= oblem has an infinite number of solutions.=0A------------------------------= ------------------------------------------=0A______________________________= _________________=0Afreebsd-geom@freebsd.org mailing list=0Ahttp://lists.fr= eebsd.org/mailman/listinfo/freebsd-geom=0ATo unsubscribe, send any mail to = "freebsd-geom-unsubscribe@freebsd.org"=0A=0A=0A