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windows 2008 R2 DC questions [message #393558] Wed, 17 February 2010 10:46 Go to next message
ed  is currently offline ed
Messages: 264
Registered: July 2009
Senior Member
Hi all,

We have 3 windows 2003 32bit Domain controllers. we are going to introduce
new windows 2008 domain controllers for around 800 users. Currently, our
windows 2003 DC is configured to use two disk RAID1 for OS, RAID 5 for
database and log. (the database dit is about 120MB). Can we use th same
RAID 1 for OS and RAID 5 for DIT and log? or just use two disk RAID 1 for
everything? Which one is better? any other recommendation?
BTW, will it affect our exchange 2003 and windows XP clients, group policy?

Thank you.
Re: windows 2008 R2 DC questions [message #393581 is a reply to message #393558] Wed, 17 February 2010 11:05 Go to previous messageGo to next message
florian  is currently offline florian  Germany
Messages: 484
Registered: July 2009
Senior Member
Howdie!

ed schrieb:
> We have 3 windows 2003 32bit Domain controllers. we are going to introduce
> new windows 2008 domain controllers for around 800 users. Currently, our
> windows 2003 DC is configured to use two disk RAID1 for OS, RAID 5 for
> database and log. (the database dit is about 120MB). Can we use th same
> RAID 1 for OS and RAID 5 for DIT and log? or just use two disk RAID 1 for
> everything? Which one is better? any other recommendation?
> BTW, will it affect our exchange 2003 and windows XP clients, group policy?

Since you're going to introduce new servers, are those "old" DCs
replaced? Will the new DCs be x64? If so, I wouldn't care too much about
the database and the "speed". You have a kind of redundancy built into
AD if you're deploying DCs.

I'd deploy the DCs with 2 GByte of RAM at least and not thing any
further about the database and the logs. If you're still keen on doing
something for performance, move the DIT and the logs to a different disk
than the OS. For failures and DB failures (they're rare, anyway), you
can still restore from backup.

Cheers,
Florian
--
Microsoft MVP - Group Policy
eMail: prename [at] frickelsoft [dot] net.
blog: http://www.frickelsoft.net/blog.
ANY advice you get on the Newsgroups should be tested thoroughly in your
lab.
Re: windows 2008 R2 DC questions [message #393623 is a reply to message #393558] Wed, 17 February 2010 12:02 Go to previous messageGo to next message
meiweb  is currently offline meiweb  Germany
Messages: 2225
Registered: September 2009
Senior Member
Hello ed,

I agree with Florian, just use the default on a RAID 1, if you experience
performance problems you can move the .dit and the logfiles also later on
to another drive.

More important is redundancy for DC/DNS/GC in the domain with at least 2
of each. Additional a DC shouldn't do anything else then AD/DNS/GC and if
no other option with a member server exist DHCP, that's it.

Applications shouldn't be installed on a DC, especially not Exchange or SQL.

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


> Hi all,
>
> We have 3 windows 2003 32bit Domain controllers. we are going to
> introduce
> new windows 2008 domain controllers for around 800 users. Currently,
> our
> windows 2003 DC is configured to use two disk RAID1 for OS, RAID 5 for
> database and log. (the database dit is about 120MB). Can we use th
> same
> RAID 1 for OS and RAID 5 for DIT and log? or just use two disk RAID 1
> for
> everything? Which one is better? any other recommendation?
> BTW, will it affect our exchange 2003 and windows XP clients, group
> policy?
> Thank you.
>
Re: windows 2008 R2 DC questions [message #393651 is a reply to message #393581] Wed, 17 February 2010 12:37 Go to previous messageGo to next message
florian  is currently offline florian  Germany
Messages: 484
Registered: July 2009
Senior Member
Florian Frommherz [MVP] schrieb:
> I'd deploy the DCs with 2 GByte of RAM at least and not thing any
> further about the database and the logs. If you're still keen on doing
> something for performance, move the DIT and the logs to a different disk

What I wanted to say with this is that, if the DIT can be placed in RAM
(if there's enough RAM to place large parts of the DIT into RAM),
there's no need to have a super-fast-fancy hard disk system. Most of the
things is handled in memory and I/O is reduced.

Cheers,
Florian
--
Microsoft MVP - Group Policy
eMail: prename [at] frickelsoft [dot] net.
blog: http://www.frickelsoft.net/blog.
ANY advice you get on the Newsgroups should be tested thoroughly in your
lab.
Re: windows 2008 R2 DC questions [message #394410 is a reply to message #393558] Thu, 18 February 2010 10:35 Go to previous message
Jorge Silva  is currently offline Jorge Silva
Messages: 398
Registered: July 2009
Senior Member
Hi
There's no way to give you a correct answer without knowing the current
metrics for your environment needs. Assuming that you'll have Windows 2008
R2, only 64bit is available and memory sizing is no issue. Regarding to disk
speed and RAIDs (1 & 5) that you mentioned, the fastest is RAID1, but is
also the most expensive from the 2 options. In most common scenarios, the
configuration that you mention should be enough , but if you're worried
about disk performance, first you should take the proper metrics from the
current environment and do the disk sizing + RAID configuration.

--

I hope that the information above helps you.
Have a Nice day.

Jorge Silva
MVP Directory Services

Please no e-mails, any questions should be posted in the NewsGroup
This posting is provided "AS IS" with no warranties, and confers no rights.




"ed" <ed@discussions.microsoft.com> wrote in message
news:F019488E-377D-40DF-A59E-E881B40E37E5@microsoft.com...
> Hi all,
>
> We have 3 windows 2003 32bit Domain controllers. we are going to
> introduce
> new windows 2008 domain controllers for around 800 users. Currently, our
> windows 2003 DC is configured to use two disk RAID1 for OS, RAID 5 for
> database and log. (the database dit is about 120MB). Can we use th same
> RAID 1 for OS and RAID 5 for DIT and log? or just use two disk RAID 1 for
> everything? Which one is better? any other recommendation?
> BTW, will it affect our exchange 2003 and windows XP clients, group
> policy?
>
> Thank you.
>
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