RE: Redundant DC's ?



Hello Johannes,

speaking about the DCs having two DCs which are both GC and DNS is
sufficient for redundancy. The FMSOs such as the Schema Owner are not that
important when the domain is up and running that you can't run without them
for a certain time. E.g. the Schema Owner is only needed when you want to
update the Schema, the Domain Naming master when you want to add new domains
or application partitions, the PDC-Emulator for synching to NT BDCs,
providing the reliable time source and a couple more things, the RID-Master
if your DC runs out of SIDs (when adding 500-1000 users), and the
infrastructure master is not needed anyways if you only have one domain
and/or every DC is GC in that domain. So you usually can live without them
until the other server is fixed and recovered. And the DC won't run inside
the cluster anyways, it will always rely on each node.

File and print require a bit more work. Implementing clustering will be the
best solution here, however if you don't have multiple users accessing the
same files you can use DFS/FRS to anonymize the shares and replicate them
between the servers. This would provide redundancy for the file services.
Note that DFS in Windows Server 2003 R2 which is due this year works much
better and is much better when it comes to replication.

The print services are not possible to keep as redundant, however you could
install the printers on both servers, and if you experience issues you can
instruct your users to map the printers on the other server.

--
Gruesse - Sincerely,

Ulf B. Simon-Weidner
Blog: http://msmvps.com/ulfbsimonweidner


"JSebastian" wrote:

> Hi
>
> I am to set up a couple of redundant services:
>
> * Active Directory
> * File service(DFS) and
> * Print service
>
> I have considered clustering, but the Windows Server 2003 Enterprise
> Edition seems pricy.
>
>
> The setup I'm having in mind is as follows:
> Two identical servers, both running 2003 Std. edition with AD and DNS,
> constantly replicating data and AD/DNS content.
>
> A demand is of course that if one server fail parcially or completely,
> the other one is ready to step up on very short notice....
>
> But I think I'm beginning to realise that this setup will never work,
> because of the AD domain "Schema Role", that has to be owned by of the
> servers, will fail if the server having it, fails.
>
> Am I right?
> Maybe there are other reasons why such a setup wouldn't work?
>
> What options to I have, is clustering the only way to ensure such
> redundancy/availability?
>
> Many thanks in advance!
>
> Johannes S. Nielsen
>
>
.



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