Al Mulnick
Guest
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 Posted:
Fri Sep 02, 2005 4:32 pm Post subject:
Re: Domain Controller Vs Global Catalog Server |
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A domain controller is an authentication and authorization mechanism in
Active Directory. A GC is an added feature that allows you to find
information globally by maintaining a subset of information from all domains
in addition to the full information of it's own domain.
You need at least one GC per domain. Because a GC is so used by AD and
Exchange, it is often recommended to have all DC's be GC's in single domain
environments. In multidomain environments, it's not always a good idea to
make all DC's a GC.
Exchange relies heavily on GC's. To the point that you really do want to
dedicate some for Exchange as you scale your servers up in user density.
A typically rule of thumb is to provision at least 1 cpu cycle for every 4
cpu cycles that your Exchange server is capable of. That roughly translates
into 1 processor for every 4 Exchange processors. You should additionally
have at least two GC's in the domain on the same subnet as Exchange in many
cases because of its reliance on the GC. AD integrating DNS is a helpful
factor as well. All of this contributes to availability of Exchange.
You can find more information at http://www.microsoft.com/exchange/library
and look for the design and deployment documentation.
Al
"Paraclete" <Paraclete@discussions.microsoft.com> wrote in message
news:0BF1C552-EDEE-43D3-9CE4-F8C994DF077C@microsoft.com...
| Quote: | Hi,
What are the differences between Domain Controller and Global Catalog
Servers?
Can these be on two different machines?
How many Domain Controllers and GC Servers be in one exchange organization
and what are the driving factors (design issues) behind them?
Any help link detailed informaiton on the topic?
Thanks in advance,
Paraclete |
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