ActiveDir] How AD Works (thread hijack to AD Maximums)

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  • Last Post 11 November 2016
michael1 posted this 10 November 2016

Remember what the average computer power and memory of a server was in 1999. And the fact that the size of an ESE DB page changed.

 

I think the info in the article is somewhat dated. And it is somewhat dependent on whether the domain/forest is using classic DFS or DFS-R.

 

Read the comments from Kurt Hudson and Dave Loder. They are quite informative:

 

A non-LVR multivalued attribute is limited to the number of "pointers" that can fit on an ESE page. W2K is ~850 (pointers are 8 bytes)

W2K3/8 is ~1300 (pointers are 5 bytes).

 

While it is an expectation that DFS-R will improve that number, there is nothing official to prove it yet. I have to wait until it

is officially proven internally before I can add it to this article.

 

Thanks.

 

Regards,

Michael B.

 

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michael1 posted this 10 November 2016

…after they have been thoroughly tested – by customers in the real world, not in MSFT dogfood. 

J

 

MSFT never thought anyone would deploy 800+ DCs. When <harrumph> (some arbitrary customer) ran into the limit, they were shocked. Now there are more than a

few customers deployed at this size…

 

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michael1 posted this 11 November 2016

Oh, just consider the US Army and the US Navy.

 

Can a submarine guarantee 100% network connectivity to an upstream DC? Of course not…

 

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jeremyts posted this 11 November 2016

Yeah, DoD would be a valid specialised use case….but not too much more.

 

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DonH posted this 11 November 2016

Generally what happened is that we spitballed (1) what dev thought should work, (2) what test could commit to verifying, and (3) what program management thought customers would accept, and then wrote down a number that satisfied all three.  Sophisticated statistical models were, um, not involved. DonH 

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slavickp posted this 11 November 2016

1200 wasn’t a limit even on Windows 2000.
Regards
Slav
MCM-DS

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slavickp posted this 11 November 2016

“We need each branch to operate autonomously in case of network outage”. Been there, disagreed, overruled, had to support and recover. The stories I can tell… #ADHorrorStory
Regards,
Slav
MCM-DS

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