Windows Server 2012 R2: Domain Controller Minimum Requirements & associated server roles

Quite moderate minimum requirements for the basic hardware requirements, but depending on usage (as always) the more RAM the better.

  • Processor Minimum: Single processor with 1.4 GHz (x64 processor) or 1.3GHz (Dual Core)
  • Memory Minimum: 512 MB RAM
  • Disk Space Requirements Minimum: 32 GB or greater

Usually the question also goes hand-in-hand with the other tasks that machine can perform:

  • "There are certain roles that typically get folded in with the domain controller in all but the biggest networks (e.g. DNS/DHCP/WINS/Cert Server) with little harm."
  • "There are some that get folded into a DC and will cause performance issues on all but the smallest networks (e.g. File Server/intranet server/WDS Server) but these issues are probably manageable depending on load.
    These previous two classes of role are a case of a balancing act, how concerned you are about performance on your DCs vs. the resources you have available to provision your network. It's better to have a file server on the DC than to have a network without a file server at all because you have nowhere else to put it."
  • "There are some services [..] you should try to avoid mixing with the DC role as much as possible, due to possible serious performance, disaster recovery and/or security issues (exchange server, SQL server, Internet server and proxy server)."

Sources:
Serverfault.com: What are the requirements on a windows domain controller?

Keywords:
Domain Controller, DC, Active Directory, AD, Windows Server 2012 R2, Microsoft

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