|
|
|
date: Fri, 29 Apr 2005 05:28:49 -0500,
group: microsoft.public.exchange2000.clustering
back
Re: SMTP and MTA
Sincerly, 4K users and you'll put an A/A/A/P cluster ? It looks like a
heavy solution for a so few users, consider buying 4-way/4GB servers and
build an A/P clusters, save money :) -- also that'll save you to install
too many DCs to support the AD load generated by Exchange virtual servers.
Sizing:
- cluster logs (RAID1): use a 1GB LUN, that's bug, but will save you
from encountering problems in case your checkpoints aren't flushed
- MSDTC (RAID1), place your MSDTC logs on the Quorum disk, unless
you're planning to architecture your E2K3 cluster to host workflow
applications
- SMTP Queue (RAID1), most depends on the volume of e-mails you're
intending to send and receive, keep in mind that unless big troubles,
queues in Exchange are flushed very fast. Also, if yoo're intending to
install SP1 (which I would recommended), remember Badmails are no longer
retained, so won't fill your disk with junk. For 4000 users, you can use
a quite small LUN, 10 GB would be pefect to plan for growth. You can
even place MTA here unless your users are totally cray and send messages
faster than speed of light ;)
- transactional logs (RAD1 or 0+1): the size of transactional log
volumes depends on many factors:
* number of users in the SG
* frequency of full backups (in general 6 days between fulls, 6 days
incrementals + 1 full)
* value of 4G per 1500 users chunk is a commonly used value, per day
So for 4000 users, specarated in 4 SG (1000 users per SG),
then separated in 5 IS (that fills up your EVS):
* size for SG logs: (1000/1500)*4*6 = 16 GB
For Mailbox Stores, IS size depends on Quotas, for a 100 MB quota
count in a very basic fashioned way:
* size of an IS: 200*100 = 20 GB
* don't forget IS growth + deleted items retention, in general count
50% more, that'd make 30 GB MAX (it's oversized but who cares ;)) per
mailbox store
Don't forget Public Folder store (should be rather small, unless you
want to make big use of public folders) -- Using a dedicated PF server
(out of SAN) is a good option too.
So we have:
Quorum/DTC logs 1 GB
+ logs 4*16 GB
+ mailbox stores 20*20 GB
+ SMTP/MTA 10 GB
+ Exchange disk 20 GB (no real calulation, depends what you want to
place there, for example gathering logs, tracking logs, etc.)
I stringly advice you to use RAID5 for mailbos/public stores, RAID1 or
RAID0+1 for the rest.
I generally prefer being presented one LUN per bit, in this case I make
use of mount points (Windows 2003 only !), which offers two advantages:
- build a nice directory structure
- avoid having too many drive letters
Hope this helps,
Ben.
TheTman wrote:
> I understand there is no exact situation but there are guidelines and
> suggestions such as Exchange logs files. Anyway, I do have 4000 users and
> there is no current data on how much SMTP traffic that the customer can
> provide. I am planning for a 5G disk space for the SMTP. I hope that would
> be sufficient since nothing get stored and the queue should not reach that
> size.
>
> Thanks,
> TS
>
>
date: Sat, 07 May 2005 00:01:25 +0200
author: DOT benoit(DOT)boudeville@club-internet.fr
|
|
