From owner-freebsd-questions@FreeBSD.ORG Sat May 21 15:57:53 2011 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 85679106564A for ; Sat, 21 May 2011 15:57:53 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-fx0-f54.google.com (mail-fx0-f54.google.com [209.85.161.54]) by mx1.freebsd.org (Postfix) with ESMTP id 160258FC0A for ; Sat, 21 May 2011 15:57:52 +0000 (UTC) Received: by fxm11 with SMTP id 11so4458163fxm.13 for ; Sat, 21 May 2011 08:57:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=nJhnf8YZ7qHidQ36Yx6YCoBcjQCkDuEzL53ahdpMOCA=; b=ML1bEJGGI1b2dk1eWur0X/VYF0RmdLBHoiPGOhDfSwlwYmFmOejqCokliCxlhup0+M 94Yzxp2it8HQQ/lfVG6lGI9DUHrZAWYlZqDRaaAVp3BhqyExLylkHROhShV/O66R4CAV OkvqHJO3+BmXX+t+WZUQ5Kx1R+yTIVpHZex4I= 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=qOF8hr28iKrDcIwr+BAEnGzPjZifbUITEJXbSIadB6oj7pG7d1/m8whWfZaDTLM382 4fH38Gm7i5Xux3DpZ87ekDtBVxQZ+LM8qkiwiz9ttDpHEY7sZcd7sX3nuIG5J/1/8PBA JLjcijpce4OHQaQE+qNPYG2R59Qf74AjpAgFw= MIME-Version: 1.0 Received: by 10.223.144.136 with SMTP id z8mr733496fau.31.1305993471776; Sat, 21 May 2011 08:57:51 -0700 (PDT) Received: by 10.223.118.148 with HTTP; Sat, 21 May 2011 08:57:51 -0700 (PDT) In-Reply-To: <4DD638C1.7080007@ukr.net> References: <4DD638C1.7080007@ukr.net> Date: Sat, 21 May 2011 10:57:51 -0500 Message-ID: From: Adam Vande More To: "Vladislav V. Prodan" Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: FreeBSD Mailing List Subject: Re: Tell a minimum requirement for RAM for virtual machines (virtualbox) 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, 21 May 2011 15:57:53 -0000 On Fri, May 20, 2011 at 4:47 AM, Vladislav V. Prodan wrote: > Tell choice OS (8.2, 8.2-CURRENT or 9.0-CURRENT, FS (UFS or ZFS) and the > minimum amount of RAM for use in such schemes: > 1) the interaction of multiple routers with established quagga (bgpv4, > bgpv6, ospf) > 2) the work of two different modes of MYSQL replication servers/clusters. > 3) backup zfs partitions/snapshots to a remote server > > > Host machine - win7 64x with 6 GB of RAM > > Thank you for your advice. > Couple things to think about. Virtualbox by default doesn't obey flush cache commands. This is potentially a very bad thing so you'll want to look a changing the default for any ZFS VM, and probably any VM doing DB operations unless speed is more of a priority than data integrity. The other thing to keep in mind is i386 binaries use less RAM than their amd64 counter parts. For this reason, I always make my VM's 32 bit to achieve higher VM density. I have not had trouble with ZFS on i385 with 1GB+ of RAM when following the recommended tuning, but I haven't used a heavily used them either. I prefer to use the MFSBSD ZFS v28 i386 iso for the install. -- Adam Vande More