From owner-freebsd-questions@FreeBSD.ORG Fri Dec 5 05:45:15 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id E6CC7E94 for ; Fri, 5 Dec 2014 05:45:15 +0000 (UTC) Received: from mail-lb0-x22c.google.com (mail-lb0-x22c.google.com [IPv6:2a00:1450:4010:c04::22c]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 682AA243 for ; Fri, 5 Dec 2014 05:45:15 +0000 (UTC) Received: by mail-lb0-f172.google.com with SMTP id u10so12869lbd.3 for ; Thu, 04 Dec 2014 21:45:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=vTJlT8GK//By0oSC9j4Bxp0pRiLBHRxh6DjiORbM8Z4=; b=vQIRVQMPlKUMu/sZLQrCRYTG1k32mkcvG6IVEowni04FH7B5aNKpkp+vK3JPVnbgzO qyuUnLrqDHLKaOkNvIu3/dlU5mceFYbxtfN7hW5NxQseBAx2CpRm/0yX1fhuON6K2VH6 eRoRBeAoKs9XecBzARHkbn2KTc3n8VeZEH+Eh9Z/YQ08EqPcTqdIcfmksIZ5esGB/GS0 XH4G0pyyjOTltp3LFU4Gjg1IDq8y3Opg6lF32HUPOmaufgwzGPllN/284u1SwWcA/TOC e/LMAZq2L5KmH9twz7ZU/GmRf0QZ9CI1P4PyodJbsSwszRa5AUwsRF2U63alNa8TYSPD ahiA== MIME-Version: 1.0 X-Received: by 10.152.1.193 with SMTP id 1mr1080758lao.45.1417758313434; Thu, 04 Dec 2014 21:45:13 -0800 (PST) Received: by 10.152.21.137 with HTTP; Thu, 4 Dec 2014 21:45:13 -0800 (PST) In-Reply-To: <447fy665uf.fsf@be-well.ilk.org> References: <1417734458.1772.1.camel@zoho.com> <447fy665uf.fsf@be-well.ilk.org> Date: Fri, 5 Dec 2014 16:45:13 +1100 Message-ID: Subject: Re: FreeBSD working from RAM (MFSROOT) as a Workstation. From: Outback Dingo To: freebsd-questions@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 Cc: clutton X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Dec 2014 05:45:16 -0000 On Fri, Dec 5, 2014 at 4:08 PM, Lowell Gilbert < freebsd-questions-local@be-well.ilk.org> wrote: > clutton writes: > > > Is anyone use a FreeBSD as a Desktop working from RAM, using MFSROOT? > > That only speeds up the *first* load of each memory page mirroring a > disk sector. After the system has been up a while, it's actually slower > than running with a disk, because everything you actually use will have > two copies in RAM: one on the disk image, and the one that's actually > occupying normal resident pages. > > Furthermore, you have to load your whole root filesystem from disk > before you start, even the parts you haven't used yet. I would expect > that to give you a *slower* startup time. RAM is faster than SSD access, > but the SSD is non-volatile, whereas the RAM needs to be repopulated > from non-volatile storage every time you boot. And every page that is > used has to get loaded into the RAM disk and *then* loaded into virtual > memory. > > TL;DR: To run from RAM, you first have to load the RAM. The chances that > an MFSROOT does this more efficiently (than starting directly from the > nonvolatile disk) seem remote. > well a good starting point to work from is mfsbsd http://mfsbsd.vx.sk/ > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" >