Re: Whitepaper on win2003 DNS performance ?

Tech-Archive recommends: Fix windows errors by optimizing your registry

From: Ace Fekay [MVP] (PleaseSubstituteMyActualFirstName&LastNameHere_at_hotmail.com)
Date: 01/04/05 

Date: Mon, 3 Jan 2005 23:53:54 -0500

In news:elPAMmU8EHA.3592@TK2MSFTNGP09.phx.gbl,
Herb Martin <news@LearnQuick.com> made a post then I commented below
::: I believe it's much larger than that. That sounds more of an NT4
::: size based on user/computer accounts.
::
:: Why do you believe that?
::
:: Each user account, one of the larger user objects and the
:: most prevalent large object, are 4K (really.)
::
:: Computer accounts are smaller but take 20K objects:
::
:: 4k x 20k = 80 Meg -- you do the math.
::
::: I need to dig up the calculations to confirm this. IIRC, the
::: physical AD database size with a base of 10,000 users with Win2k
::: and/or XP computers, that are all mailbox enabled is almost 500
::: megs.
::
:: Not likely.

Now why are you always so punchy when I mention you may have an an error in
your post? I was trying to point out your estimate was a little light. I
would *always* welcome criticism or corrections at anytime for my errors.
You don't seem to.

That said, I easily ascertained my findings by simply using the Active
Directory Sizer tool. It's a FREE download:
http://www.microsoft.com/windows2000/techinfo/reskit/tools/new/adsizer-o.asp

I recommend anyone to use this tool who needs to estimate database size,
(taking into considerations increased attributes due to Exchange, etc),
minimum number of DCs and GCs required in a site, and much more. Although it
gives *absolute mimimal* figures, it is a help in the right direction.

Therefore, my estimate of 400megs or was slightly high. The ADSizer actually
estimated the *domain* database size, which I based it on the original
poster's scenario, which was based on 15,000 user accounts, 5000 Win2k, NT4
or XP client machines, 200 additional NT based machines (NT4, W2k, XP or
W2k3 - laptops, member servers, etc), and using Exchange for email services,
and one site (for database size, for the argument sakes, it doesn't matter
how many sites you have), to be:

654megs per DC/GC.

If Marlon does not have Exchange, the database size would be smaller
(because of less attributes per user account and mail-enabled group
objects):

558megs per DC/GC.

So Herb, please check YOUR math.

Herb, please be a little more forgiving in the future. WE ARE ALL WORKING
TOGETHER IN THESE GROUPS, and we're not here to criticize each other.

Ace

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