Windows Server 2003 DC Replication

Posted on 2005-04-11
Last Modified: 2012-06-21
I need to know the bandwidth requirement for DC (Domain Controller) replication.
Either by calculate manually or if there is a table including the number of users/objects and required bandwidth for the replication.

Formula (number of users/objects * bandwidth per user=needed bandwidth)
Or: 1-10 users = needed bandwidth
10-50 = needed bandwidth
50-100 = needed bandwidth
100-150 and so on...

The domain contains approx. 1000-2000 user accounts.
Question by:MikaelEriksson
    LVL 16

    Expert Comment

    Microsoft Publish these formulae in the book "Building Enterprise Active Directory Services: Notes from the Field".

    I have a spreadsheet which has all the formulae built in and if you give me the following numbers, i'll post a figure for you:
    Number of User Account Objects
    Number of Computer Account Objects
    Number of Printer Objects
    Number of Group Objects
    Password Expiry Time (Days)
    Number of Additional Attributes Stored Per User
    Number of Groups Joined by Each User
    Number of Object Attributes Changed Per Day
    DNS Integrated Zone Update Frequency (Days)
    Number of Other Objects to be Modified or Delegated Per Day
    Number of Objects Having Security Altered Per Day

    You can estimate these if you like - or let me know if you want me to estimate for you based on having done a few!

    Bandwidth requirements are not calculated linearly so I can't do you figures for 1-10 users, etc. I can only give you a total daily replication for every DC.


    LVL 7

    Accepted Solution

    This tool is the easiet way, and it's free

    LVL 16

    Expert Comment

    The ADSizer works out how big the database is. I don't think it works out the replication traffic bandwidth requirements.


    LVL 1

    Author Comment

    I will try to get the numbers for you.

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