Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

What is the optimal domain controller to users ratio for a site using Windows Server 2008 R2?

Posted on 2010-11-18
2
1,388 Views
Last Modified: 2013-11-25
We currently have around 160 users with 2 domain controllers at a site. We have some monitoring software running and it is showing over 60 LDAP connections to the each server. I am going to add another domain controller to the site but I was wondering what the correct ratio of domain controllers to users is. We are going to implement some network intensive applications so I'm assuming the LDAP connections will only get higher after that.
0
Comment
Question by:pphm
2 Comments
 
LVL 6

Accepted Solution

by:
thiagotietze earned 125 total points
ID: 34170326
Hi,

Here is some documentation about this:
http://technet.microsoft.com/en-us/library/cc728303%28WS.10%29.aspx

As a quick answer I would tell you that, you don't need to care much about the number of Domain Controllers, with Windows Server 2008 R2 this is more realistic then ever was...
I said that because the number of "connections" and requests have increased a lot, with the usage of 64 bit Operating system.

If I were you, I would re-think the possibility of placing a new Domain controller.
I think it is just a waste of hardware :-)

As you can see in the document, things start to go "critical" wjen you reach 3000 users... based on ONE domain controller.


And yes, you NEED to have 2 Domain controllers, in any number of users you have in a site. It is secure, and it wort the cost.
0
 
LVL 57

Expert Comment

by:Mike Kline
ID: 34170597
You can also enable field engineering logging http://support.microsoft.com/kb/314980  to log expensive and inefficient searches

I'm with thia, you probably don't need another.  The main reason for two DCs in any size domain (even 10 users).  Is for fault tolerance/uptime.

You only have one DC and that goes down hard and you have downtime/problems for users.  You have at least two and one goes down and the users shouldn't even notice.

Thanks

Mike
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Restoring deleted objects in Active Directory has been a standard feature in Active Directory for many years, yet some admins may not know what is available.
This script can help you clean up your user profile database by comparing profiles to Active Directory users in a particular OU, and removing the profiles that don't match.
This tutorial will walk an individual through the steps necessary to enable the VMware\Hyper-V licensed feature of Backup Exec 2012. In addition, how to add a VMware server and configure a backup job. The first step is to acquire the necessary licen…

766 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question