Re: [Hampshire] New box for Virtualisation

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Author: Dr Adam Trickett
Date:  
To: Hampshire LUG Discussion List
Subject: Re: [Hampshire] New box for Virtualisation

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On Monday 06 Oct 2008, Rob Malpass wrote:
> Hi all
>
> I need some pretty basic advice on building a new box specifically for the
> purposes of virtualisation (running about 3 servers). My current Sempron
> 3200+ with 2Gb of RAM isn't cutting it. So, without the funds to go
> really top end, I'm going for the fastest CPU I can afford and give it
> plenty of RAM. Q1 - is this a good strategy for virtualisation?
>
> Q2 Do I have to run a 64-bit kernel to address all 6Gb (if I go for that
> much) RAM? I heard a while back that XP can't handle anything over 2Gb
> without patching - not sure about Vista. Probably an academic debate
> because I intend to run Ubuntu - but I wanted to check whether it had the
> same restriction. The problem is that the graphics card I have in mind
> (bought for 80UKP last year) didn't work well with 64-bit Ubuntu or Fedora
> - though that's probably fixed by now. Running in 32-bit mode (both
> distros) was fine - but would obviously be self defeating if I can only
> address 1/3 of my RAM as a result of running in 32-bit mode.


Your question is a familiar one - see the many answers you have all ready.

My approach was to buy a cheap AMD X2-6400+ with 4 GiB of RAM. That's running
Debian Lenny 64-bit - with a flat memory map. I had originally intended to
run various virtual systems with Xen - but that's a joke in Lenny/AMD64 so
instead I tried VirtualBox-OSE, which works perfectly well. I run one VM
during the day with NAT that I SSH into from the outside world. When I don't
need it I just shut the VM down and it's then impossible to SSH into my home
box anymore.

I run VirtualBox-OSE headless, using xvfb-run in SDL mode, as the real
headless rdp version isn't Open-Source-Edition. Seems to work plenty good
enough for me.

I did try Qemu/kqemu but I found VirtualBox easier to live with and a lot
easier to configure for the network, but in the past I've been a big Qemu
user.

HTH.

--
Adam Trickett
Overton, HANTS, UK

Blessed are the pessimists, for they test their backups.
    -- anon