Blog Archives

Why virtualize Domain Controllers?

This entry is part 1 of 6 in the series Virtualizing Domain Controllers on vSphere

One of the questions I get asked a lot is: Why virtualize Domain Controllers? So, in this blogpost, I’m showing you reasons why virtualization for Domain Controllers and Active Directory is a good idea. I also know there are a lot of caveats when virtualization Domain Controllers, so this blogpost serves as a small part […]

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Sizing Domain Controllers correctly on VMware vSphere

This entry is part 2 of 6 in the series Virtualizing Domain Controllers on vSphere

In the first part of this series, we discussed why we want to virtualize Domain Controllers. The first question people ask is: How do I properly size Domain Controllers on my virtualization platform? Specifically, for VMware vSphere, this is a good question, because there are a couple of areas of attention, beyond the recommended practices […]

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Managing Active Directory Time Synchronization on VMware vSphere

This entry is part 3 of 6 in the series Virtualizing Domain Controllers on vSphere

One of the hardest things to get right with virtual Domain Controllers is the time hierarchy in Active Directory. Recommended practices from Microsoft have been all over the place, but seem to have solidified in the last years, but the question remains: How do I manage Active Directory Time Synchronization on VMware vSphere? This is […]

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Replication considerations for Domain Controllers running on VMware vSphere

This entry is part 4 of 6 in the series Virtualizing Domain Controllers on vSphere

Active Directory utilizes a multi-master replication model. It’s great that each Domain Controller provides read and write access to the Active Directory database, but it comes with a big drawback: Domain Controllers need to be in sync to provide consistent data to clients, independent of the Domain Controller communicated to. A big question to ask […]

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Active Directory Virtualization Safeguards with VM-GenerationID on VMware vSphere

This entry is part 5 of 6 in the series Virtualizing Domain Controllers on vSphere

Arriving at the fifth part of this series on Virtualizing Domain Controllers on vSphere, I managed to gather some feedback on these blogposts. One question that emerged after writing the last blogpost on Replication considerations for Domain Controllers running on VMware vSphere was: Isn’t Windows Server 2012 supposed to solve all these challenges with virtualizing […]

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Domain Controller Cloning on VMware vSphere

This entry is part 6 of 6 in the series Virtualizing Domain Controllers on vSphere

After detailing Active Directory Virtualization Safeguards with VM-GenerationID in part 5 of this series on Virtualizing Domain Controllers on vSphere, it’s time to talk about the second Active Directory Domain Services feature that is enabled through the VM-GenerationID technology: Domain Controller cloning.   About Domain Controller cloning Microsoft recommends not re-using Domain Controllers for other […]

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