I don't know what are you thinking about E2k, but somehow its one of the biggest lack is its relation to GCs. I haven't noticed any ways to make load 'balancing' between GCs (except DNS round-robin). For example, if I have three different GC servers:
a) good b) a little better than good c) great
How I can show to my two servers that in mainly use server 'c', but put 30% of requests to 'b' and 20% to 'a'.
On the other hand; if I have 20 old servers (but enough for GCs) and one big exchange server. How I can tell to E2k to use all of these 20 GC servers.
One information what has been also missing (and what I have tried to search) is user profiles in sentence:
1 GC (1 x cpu) for 4 E2k (1 x cpu)
If the users are sleeping almost all days is that still correct ?
But it seems that there is no environment where GC and E2k are sitting on the same servers (except small offices).
.-Pepi-.
General recommendation is to keep Exchange off your domain controllers, in
all but the smallest environments. It sounds like you're well beyond small
environments, so that's a good start.
The best estimator I've seen is to use a 4-to-1 ratio of CPUs in Exchange to
GCs. So, 4 Exchange servers with 4 processors each would be 16 processors,
therefore needing 4 processors of GC.
I'd find the scenario of 4 single processor Exchange servers hosting a large
number of users each to be scary at best.
------------------------------------------------------
Roger D. Seielstad - MCSE
Sr. Systems Administrator
Inovis - Formerly Harbinger and Extricity
Atlanta, GA
> -----Original Message-----
> From: Petri [mailto:omatesti@;jippii.fi] > Sent: Thursday, October 31, 2002 12:08 PM
> To: Exchange Discussions
> Subject: Exchange 2000 and GC
> > > Hi Folks,
> > I have plans to create almost a big Exchange 2000 > environment. And I have
> some open question where I need more a real life answers than MS-white
> papers.
> > At first I will create own AD site for Exchange 2000, so > users logons will
> go other sites. Also I thought to install GCs on the same servers than
> Exchanges are. I haven't seen any good answers we should I > not to do this.
> Backup/recovery might be one and if I have problems with GC, > but still...
> > But if I use GCs on the same server, then I might have better > performance
> from GC, less users and only one Exchange per GC. Maybe I > need one server
> more to decrease user counts on one server, but it should not > be so big.
> So I don't need so much hardware. And now it is very easy to > dedicate one
> GC per one Exchange 2000 servers.
> > If I use separated GC servers:
> MS recommends using one CPU in GC against four Exchange servers, which
> have one CPU. This sounds like no matter how many users we > will have in
> Exchange servers ? If I have eight servers where are 10 users > in each one.
> Do I still need two GC servers (assuming that servers are one CPU
> servers).
> > Is here anyone who have more than ~3500 users per server which is not
> clustered ? May I hear any comments from you, how it really > works ? How
> often you are rebooting your servers or unmounting databases > ? Was it SLA
> your only argument when you planned storage groups and databases ?
> > > best regards
> .-Pepi-.
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