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How does increasing the number of replication connections on a DC effect network traffic/bandwith?

Answered How does increasing the number of replication connections on a DC effect network traffic/bandwith?

  • Wednesday, February 13, 2013 4:13 PM
     
     
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    Hello and thanks in advance for your posts!

    I have a domain with one central office and 10 remote sites. The central office has 4 DC and the sites all have one RODC.  All the inbound replication connections for the sites come from the central office in your typical hub/spoke topology. Each RODC has a manually created replication connection to each DC at the main office.

    My question is:

    Does increasing the number of connections increase the amount of traffic during replication?

    For example, is having 4 connections make it replicate 4 times as opposed to once with one connection?

    Or does it replicate once and the other 3 connections do not because the is some awareness that replication completed?

    Or does it replicate once and the the other 3 check for consistency?

    Can anyone explain?


     

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  • Wednesday, February 13, 2013 4:42 PM
     
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    Typically you would rely on the ISTG and KCC to automatically generate replication connections for you.  Provided you have one site link for each remote site that includes that remote site and your hub site, you would automatically get one connection object between the remote site RODC and one of the hub site DC's that is acting as a bridgehead server.  Allowing AD to manage replication for you is generally safer than managing connections yourself.

    However to answer your question, no, adding additional connection objects will not increase bandwidth consumption.  Domain Controllers keep track of changes in order to minimize replication.  This article may help to understand how replication works: http://technet.microsoft.com/en-us/library/cc755994(v=ws.10).aspx

     
  • Wednesday, February 13, 2013 4:57 PM
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    Traffic won't increase.  You have a bridgehead server defined for each AD partition and each site's bridgehead replicates to the bridgeheads of the other sites.  Once the Bridgeheads have the delta's they replicate to other Dc's within the site via intrasite replication.
    http://www.windowsitpro.com/article/administration-tools2/bridgehead-servers-24223

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