• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 775
  • Last Modified:

Global Catalog Query: Nice Easy points!

New to w2k and I have some queries about the global catalog server.

I am aware that the first DC in a forest becomes the global catalog server.

What I am reading tells me that if the global catalog server is not available then users cant logon, fair enough, but is this the case if another DC in the same domain is presesnt but is not a global catalog server?

If you have 3 DC's in a domain can they all be GC servers?
0
Gazzbut
Asked:
Gazzbut
  • 6
  • 3
  • 3
  • +2
1 Solution
 
BigC666Commented:
howdy,

have a look at this http://www.jsiinc.com/SUBG/TIP3100/rh3115.htm

hope that it helps
0
 
Pete LongTechnical ConsultantCommented:
>>If you have 3 DC's in a domain can they all be GC servers?

yes - but if you put the GC and the Infrastructure master on the same domain controller - it defeats the object of having an infrastructure master (cause its local copy will be the same as the GC - cause it IS the GC) so it will never find any differences.
0
 
jdeclueCommented:
Here is some more info.

If the global catalog is down, only domain admins can log into your network. So, yes, if it goes down your users will not be able to log in. If you have 3 DC's then you should have 2 Global Catalogs. You should not put the Global Catalog on the server running the Infrastructure Master. Here is an article on the proper placement of FSMO roles and Global catalogs in a 2000 AD environment. http://support.microsoft.com/default.aspx?scid=kb;EN-US;223346

So if your first DC is holding all of the roles (as it should be), you should read the above article, understand what FSMO roles are and decide on how you want to lay it out.

You may make any domain controller a global catalog, by opening Active Directory Sites and Services and opening up the sites, site, and then right click on the server and selct properties. Global catalog is a check box option on the properties page.

J
0
Upgrade your Question Security!

Your question, your audience. Choose who sees your identity—and your question—with question security.

 
jdeclueCommented:
I am too slow, I got called away... ;)

J
0
 
GazzbutAuthor Commented:
What is an infrastructure master?
0
 
jdeclueCommented:
If you only have 1 domain, and you will not be running any "Sites", meaning you have 3 DC's in one network and they are all local then... you can just make another DC a global catalog, and not worry about the infrastructure role. You can learn all of that, in your own time ;)

J
0
 
Pete LongTechnical ConsultantCommented:
On smaller domains with a limited number of domain controllers, the Schema Master and the Infrastructure Master are the same Windows 2000 domain controller.
The Schema Master is typically the first server you brought online using Windows 2000 Server. It is the Schema Master because it defines the Active Directory schema for the domain (the schema being the actual definition of the objects contained in the Active Directory). There is only one Schema Master per Windows 2000 forest (which can be many domains).
The Infrastructure Master is charged with the task of upgrading group and user associations. It keeps track of what groups users belong to. If group membership changes, the Infrastructure Master records this and then replicates it to the other domain controllers in the domain. When you create the first domain in a Windows 2000 forest, that domain controller is assigned the Infrastructure Master status.
http://www.samspublishing.com/articles/article.asp?p=98829&seqNum=5
0
 
exx1976Commented:
It is perfectly fine to make the Infrastructure master a GC, as long as ALL DC's in your domain are GCs.  If each and every DC is a GC, then the IM role is not necessary, as each DC/GC will have a correctly updated copy of everything.
0
 
GazzbutAuthor Commented:
So to clarify - you can have multiple GC's but will only have one infrastructure master and one schema master per domain?
0
 
jdeclueCommented:
You will only have 1 schema master and 1 domain naming master per Forest, then you have the other three roles in each domain, Infrastructure Master, PDC Emulator and RID master. This article really does explain it all.

http://support.microsoft.com/default.aspx?scid=kb;EN-US;223346

Let us know if you have questions with the KB.

J
0
 
exx1976Commented:
Gazzbut-   In a nutshell, like jdeclue said, you'll have one domain naming master and one schema master per FOREST.  You'll have one of each of the other three PER DOMAIN.  And, like I said before (and the above KB states), if ALL DCs are GCs, then don't worry about the IM role, since it becomes irrelevant.

"If every domain controller in the domain also hosts the global catalog, then there are no phantoms or work for the infrastructure master to do. The infrastructure master may be placed on any domain controller in the domain."

taken from the above KB..


HTH,
exx
0
 
GazzbutAuthor Commented:
sorry the rest of you - I wanted to split the points but didnt get a chance. Have they changed the system since last time i was here???
0
 
jdeclueCommented:
Gazzbut, I don't worry about the points ;) I am glad we could help.

exx1976, PeteLong and I both told him about the GC and small domains, Please do not restate our answers, do try to add something new.

J
0
 
exx1976Commented:
Internet tough guy, huh?  Don't take it out on me because he awarded the points incorrectly.  I couldn't care less one way or the other.  I was simply trying to let him know about GCs and DCs and the IM, since most people do not understand this properly, and even though MS says it doesn't matter, there still seem to be two schools of thought regarding this design decision.  I figured that my short, concise answer would give him a hand, little did I know he'd award points for it.

Do try to shut up now.
0
 
jdeclueCommented:
Not worth a response... ;)

J
0

Featured Post

[Webinar] Database Backup and Recovery

Does your company store data on premises, off site, in the cloud, or a combination of these? If you answered “yes”, you need a data backup recovery plan that fits each and every platform. Watch now as as Percona teaches us how to build agile data backup recovery plan.

  • 6
  • 3
  • 3
  • +2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now