I've got DCs for domains in the tens-of-thousands of objects range that are 
running on 1GB (server core). Others in the same range need 4GB.

Depends, as always, on your applications and the load you are placing on the 
DCs.

Regards,

Michael B. Smith
Consultant and Exchange MVP
http://TheEssentialExchange.com


-----Original Message-----
From: Ben Scott [mailto:[email protected]] 
Sent: Friday, December 02, 2011 6:23 PM
To: NT System Admin Issues
Subject: Re: Virtualization - Sizing, hard disk config

On Fri, Dec 2, 2011 at 4:56 PM, Matthew W. Ross
<[email protected]> wrote:
> I have 3 DCs. 1 is physical, 2 are virtual. We use Hyper-V.
> The 1 physical DC has 2GB of ram, and we have 1000 PCs.
> The two virtual ones have 1194 MBs of ram, and a "BackupDC"
> which has 800 megs of ram. The BackupDC is slow to use, but
> seems to do the DC jobs just fine.

  Thanks.  That's good info.

  I'm sure every domain is different (in particular, I expect it's not
really the size of the database, but requests/second (hmmm, I *should*
benchmark *that*)), but this at least gives me some clue.

> I'm sure Microsoft has a document about server sizing that directly
> addresses the memory requirements for a size of a domain
> somewhere, right?

  They do, it doesn't scale down this small.  Capacity planning docs
all seem to assume if you're asking these questions you must be in the
1000+ element range.  I'm trying to scale in a different dimension
than they anticipated.

-- Ben

~ Finally, powerful endpoint security that ISN'T a resource hog! ~
~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/>  ~

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