I want to be able to load up an Active Directory server with a realistic medium-to-large enterprise directory structure (groups, users) so that I can run performance tests on an application which makes use of that data. In my fantasy world, some big company would export their (anonymized) AD structure in a way I could import directly. Since this seems unlikely to happen, does anyone know of a source for test data that would provide a reasonable simulation of a 10-to-100k employee organization's structure? I could generate data myself, but I don't want to make too many assumptions about levels of group nesting, how many groups a given user is a direct member of, etc.
My company fits in your range. Here's some stats to help you simulate the environment: we have one top-level OU per division. All user, computer and groups accounts reside under one of them. Each division has its own admin team and authority is delegated to them to control their own OU structure. Some teams have wide structures with OUs for each department, with users under them, OUs for groups and other OUs for computers. Others have deep structures with OUs in OUs in OUs - current max is 12, I think. Other have fat (for want of a better word) structures: Separate Users, Computers and Groups OUs but no further subdivision of Users or Computers (so there can be several thousand accounts in each). Branch offices tend to have their own OUs with Users, Computers and Groups underneath, under a divisional OU.
We hit the token size limit for group membership. Some admin teams have massive, complicated delegated admin structures and users can be in hundreds of groups. Others have simple ones but group policy groups, distribution groups and normal security groups can still lead to 50 or 60 groups for a user. We also use groups for computer group policy and for software distribution so most computers would be 5-30 groups. There are a couple of apps using AzMan (data in CN=Program Data).
Groups aren't usually nested more than 3 or 4 deep because it gets hideously messy.
We have about 35,000 users and 20,000 groups.
Hope that helps.