From owner-freebsd-xen@FreeBSD.ORG Sun Aug 30 10:28:44 2009 Return-Path: Delivered-To: freebsd-xen@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 23F79106566B for ; Sun, 30 Aug 2009 10:28:44 +0000 (UTC) (envelope-from lsc@prgmr.com) Received: from luke.xen.prgmr.com (luke.xen.prgmr.com [38.99.2.47]) by mx1.freebsd.org (Postfix) with ESMTP id 0E9938FC08 for ; Sun, 30 Aug 2009 10:28:44 +0000 (UTC) Received: by luke.xen.prgmr.com (Postfix, from userid 500) id 282991041EB; Sun, 30 Aug 2009 06:29:27 -0400 (EDT) To: "Sam Fourman Jr." References: <77abe410908211256g44dd20d8o9b50c20357e63a6b@mail.gmail.com> <4A98DFF6.4060404@prgmr.com> <11167f520908292254p9e5bcam3411ba3c0160df62@mail.gmail.com> From: Luke S Crawford Date: 30 Aug 2009 06:29:26 -0400 In-Reply-To: <11167f520908292254p9e5bcam3411ba3c0160df62@mail.gmail.com> Message-ID: Lines: 30 User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: freebsd-xen@freebsd.org Subject: Re: finishing up the xen port - would funding help? X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 30 Aug 2009 10:28:44 -0000 "Sam Fourman Jr." writes: > > what about the tap: driver and friends? qcow:? (these are issues > > I will need to figure out) LVM snapshots are so slow that I find them > > unsuable, so I'm not really losing much by moving to the tap: driver > > (granted, I am pushing my disks to the limit. lvm snapshots work fine if > > your disks are lightly loaded and/or faster than mine.) > > If I can ask, how does Prgmr.com allocate disk space to domu's? qcow? > also does anyone know if a NetBSD 5 or CURRENT dom0 can migrate domu's > between 2 NetBSD Dom0's ? right now, production is Linux, and uses LVM. I believe live migration works with NetBSD5, but shared storage is required for live migration, and good reliable shared storage is out of my price range. > Migration and ZFS is what I am waiting for NetBSD to have. Zfs does look pretty nice; I've been looking at building a ghetto san out of some supermicro chassis and FreeBSD or OpenSolaris, and exporting iscsi LUNs backed by zfs, but I haven't done that yet, and even after I do that, it will be a long time before I trust it. (SANs can be nice, but they are also deadly. a fibre-channel san in an open rack was the cause of much of prgmr.com's instability from 2005 through 2007. Local disk is the cheapest, fastest, and most reliable option. Shared storage gets you flexibility, but can't match, dollar for dollar, the fast, cheap and reliable of mirrored local disk, which is why most of the larger hosting companies primarly run off local disk.)