RE: [Xen-users] Running MS Terminal Server and MS SmallBusinessServerunder Xen?

["Ross S. W. Walker" <rwalker@xxxxxxxxxxxxx>]

Jamie J. Begin wrote:
> 
> >Jamie J. Begin wrote:
> >> 
> >> I have the crazy idea to run both Microsoft Terminal Server 
> >> and Small Business Server (SBS is a license-restricted 
> >> version of Windows Server with Exchange for shop with <50 
> >> users) in separate HVM domUs.  Assuming that I have a beefy 
> >> enough underlying hardware, how likely do you think this 
> >> would work?  I know that Exchange isn't one of those apps 
> >> that are ideally suited for virtualization, but this would 
> >> only be handling email for about 15 users.
> >
> >For 15 users you can get away with just about anything...
> >
> >Exchange can be virtualized, it's the storage that really
> >matters and with iSCSI and the ability to create multiple
> >exchange virtual servers to distribute the load it can
> >be made to scale in a virtualized environment.
> >
> > -Ross
> 
> iSCSI is a bit beyond what I'd be looking at for this project.  ;-)  What's
> more likely is a 2U Dell server with six 146GB 10k SAS drives in a RAID5/6
> config.  Disk IO is my biggest concern if I attempt to do this.  Any tips or
> tricks?  I'd hate to recommend that a $5k server be purchased and then have
> this blow up in my face...

iSCSI isn't that complicated and there are free Linux iSCSI targets
and the Microsoft iSCSI initiator is free, so there is minimal cost
involved (just 1Gbe NICs and switches), but for this setup it isn't
necessary, I just used it as an illustration on how to scale
exchange to work in a virtualized environment.

Why not just buy a Dell 2950 though with Small Business Server
installed on it and be done with it?

Using Xen for this setup is kinda overkill.

A Dell 2950, 2 250GB SATA RAID1 for OS, and 4 250GB or 500GB SATA
RAID5 or RAID10 for application data. Use hardware RAID card with
decent sized battery backed up write-back cache and your good to
go. I suggest the 500GB drives in RAID10 as it should allow for
a universal IO pattern.

You are not really going to see a lot of IO with 15 users.

If the number of users grows large, add iSCSI to the box and use
the local storage for online backups/snapshots. For this reason
I always get an extra dual-port Gbe card factory installed.

-Ross

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