RE: [ActiveDir] Exchange rollout - How much larger does NTDS.DIT become?

Tue, 01 Aug 2006 14:17:29 -0700

Where is the 1.25GB number from and what do you mean the ability of the 32 bit server to handle it? Do you mean cache? How much can be cached will depend on the OS level and amount of RAM but you can get up to a 2.7GB on a properly configured 32 bit K3 DC.
 
Certainly in terms of purely working, a 32 bit DC can easily handle far larger DITs, I have seen thousands of fully functioning 32 bit domain controllers running 5GB+ DITs. I have seen several DCs with 20GB+ DITs. Surely x64 with lots of RAM just does it more efficiently.
 
Also if Guido is accurate on the 100k+ users I could pretty easily see 1.25 GB being exceeded. But again, depends on the data population that is occurring and the actual number of users and how many will be mail or mailbox enabled.
 
--
O'Reilly Active Directory Third Edition - http://www.joeware.net/win/ad3e.htm 
 
 

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matt Hargraves
Sent: Monday, July 31, 2006 6:02 PM
To: [email protected]
Subject: Re: [ActiveDir] Exchange rollout - How much larger does NTDS.DIT become?

I guess the gist of what everyone is saying can be summed up with the following:

What does the current environment look like?
How extensive is your Exchange deployment going to be?

Without some of that information, it's only going to be a vague guess that anyone can give.  I seriously doubt you need to worry about breaking 1.25 GB, which is still well within the capability of a 32-bit server to handle.




On 7/29/06, joe < [EMAIL PROTECTED]> wrote:
To further add to this, it depends considerably on how populated you want your GAL to be. Some people just let the mandatory Exchange attributes get populated, others want the GAL to be the one stop shop for info on employees so everything goes into the GAL which means everything goes into AD.
 
--
O'Reilly Active Directory Third Edition - http://www.joeware.net/win/ad3e.htm 
 
 

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Grillenmeier, Guido
Sent: Friday, July 28, 2006 4:41 AM
Subject: RE: [ActiveDir] Exchange rollout - How much larger does NTDS.DIT become?

Assuming this is after defrag, 650MB without Exchange is quite a large AD – guess you'd be close to 100k users in your forest, if you've used the "standard" attributes of the objects in AD (and haven't added stuff like thumbnail pictures to your users…).

 

After adding the Exchange schema mods, the DIT shouldn't grow substantially, since AD doesn't use any space for unused attributes – and the Exchange attributes for your object won't be filled magically, until you mail-enable them. But once they are filled, it will impact your AD (e.g. E2k3 adds 130 attributes to the Public Information property set used by user class objects)

 

It is very tough to make a guess at the actual size you'd have with a fully deployed Exchange, but if you do mail-enable the majority of your users (i.e. give them Exchange mailboxes) and add DLs etc. and assuming my guess with 100k users is in the right ballpark your AD DIT would easily grow to 3-5 GB.

 

/Guido

 

From: [EMAIL PROTECTED] [mailto: [EMAIL PROTECTED]] On Behalf Of RM
Sent: Thursday, July 27, 2006 6:46 PM
To: [email protected]
Subject: [ActiveDir] Exchange rollout - How much larger does NTDS.DIT become?

 

NTDS.DIT is currently 650megs.  Once Exchange has been fully deployed, any guesses as to how much larger it will become?  Just looking for a ballpark figure...

thx,

RM


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