From owner-freebsd-questions@FreeBSD.ORG Sat Sep 19 17:22:02 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 57B131065672 for ; Sat, 19 Sep 2009 17:22:02 +0000 (UTC) (envelope-from illoai@gmail.com) Received: from mail-yw0-f191.google.com (mail-yw0-f191.google.com [209.85.211.191]) by mx1.freebsd.org (Postfix) with ESMTP id 122788FC19 for ; Sat, 19 Sep 2009 17:22:01 +0000 (UTC) Received: by ywh29 with SMTP id 29so5788792ywh.7 for ; Sat, 19 Sep 2009 10:22:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=ryBTIO+4tYdK94mI+YlnxlJ97Jer+azc9UiNbVghnQM=; b=jcu9NuiOisXMmcHqfT4FH3SX5K7iC5ULRnMXffFd0CE1jW283oIu37Uf28o6Y6W+Mb bV7pNwWZebObSeFlDZ8tblBIzuXHckZ/uniODPEVuUE0MM5iM8ZmcSmbmcW3WVDy3GHe FrRJPKndpXd17e+H2+QYA64eVwOC3Gnky9sWs= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=hhnzjBdRN4ZkMCxFXvyCIkMZaUe4jMC/f6L6rgsDrNi0WwskJv/aRr6oGs6iRp53O7 R4iLiboYv10VeSlFi7WAjGc/oGT0LGyU07GIWQFJUW7nx4GMqSfu421KH3fWOyEph8bx WqtccDVrq7KiaH8p4MJ7+o4rHN86QZ3N2dcI0= MIME-Version: 1.0 Received: by 10.91.50.29 with SMTP id c29mr1961919agk.63.1253380921313; Sat, 19 Sep 2009 10:22:01 -0700 (PDT) In-Reply-To: References: <7E2DB08A-9E11-47D7-904D-9F3D8490868E@gmail.com> <4AB22B09.4070507@ibctech.ca> <29722c130909170735w24886ac9j8c5faaed15d17bb9@mail.gmail.com> <20090917174614.GB34712@ei.bzerk.org> Date: Sat, 19 Sep 2009 13:22:01 -0400 Message-ID: From: "illoai@gmail.com" To: krad Content-Type: text/plain; charset=ISO-8859-1 Cc: Ruben de Groot , Steve Bertrand , Anselm Strauss , freebsd-questions@freebsd.org Subject: Re: ZFS on small systems X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 19 Sep 2009 17:22:02 -0000 2009/9/17 krad : > 2009/9/17 Ruben de Groot > >> On Thu, Sep 17, 2009 at 04:35:37PM +0200, Anselm Strauss typed: >> > Thanks for your advice, Steve. >> > >> > I looked a bit at the source code and in >> > /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c and I >> > found this: >> > >> > /* set min cache to 1/32 of all memory, or 16MB, whichever is more */ >> > arc_c_min = MAX(arc_c / 4, 64<<18); >> > >> > Could this mean that 16 MB are already enough to run ZFS? >> >> I seriously doubt it. >> > > Sun dont recommend it on a system with < 1 gb of ram, 2 or more is preferred > though. I believe you can install OpenSolaris (& OS by default only installs into zfs) with as little as 768M, but it will (in my exp) run terribly. Even with 4G on a dual-core 64bit lap-top it's pretty sluggish: like FreeBSD 7 on a 300mHz p2 sluggish. -- --