Re: [Xen-users] Anyone using dual 3Ghz/4gb servers?

["Nick Couchman" <Nick.Couchman@xxxxxxxxx>]

As far as the 2-way systems go, the machines I use for Xen virtualization are 2 x Socket, 4 x Core per Socket.  I don't know if that makes them 2 way machines or 8 way machines, but they're definitely on the lower end of the server range and they work great for me.  Sounds like yours are new enough that you should be able to use them without a problem.

-Nick


-----Original Message-----
From: lists@xxxxxxxxxxxx <lists@xxxxxxxxxxxx>
Reply-To: lists@xxxxxxxxxxxx
To: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] Anyone using dual 3Ghz/4gb servers?
Date: Thu, 22 Jan 2009 09:39:11 -0600

On Thu, 22 Jan 2009 07:38:13 -0700, Nick Couchman wrote:
>You could almost certainly put them to use - how useful they'll be will
>depend on what you need them for.

I've not played with xen enough yet to know a few things. For example, the servers I have been using to date are 8-way so it's pretty easy to tap from those.

I've not had enough time with xen yet to know this but when you only have two CPUs, the number of guests is still related to total resource usage and not guest count right?
In other words, the number of guests is not limited by number of CPUs but by total amount of resource usage by x number of guests, is this correct?

>Also, if those 2-way systems don't have VT capability you'll only be able to run
>paravirtualized guests - you won't be able to run HVM domUs (which rules
>out Windows and a few others).

Yes, they do offer virtualization capabilities, just like the larger count CPU units I have. 
Just kinda wondering how useful they are since they will in fact use up more power than the 8-way machines but will be individual servers.

For example, aside from power requirements: 

One, 8-way 3.0Ghz Xeon server with 16GB to 32GB memory.
vs or equate to;
Eight, dual 3.0Ghz Xeon servers each with 4GB memory, expandable to 8GB.

Trying to get a handle on what would be best to use. Most of the services will be LAMP based with a smattering of various other redundant services such as DNS, etc.

Mike

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