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date: Tue, 20 Dec 2005 14:34:46 -0800,
group: microsoft.public.exchange.design
back
Re: hardware recommendation
I must have missed this thread sorry, Please see the comments below.
--
Jonathan
No Warrenties Implied, Did you do a FULL backup today??????
"rick" wrote:
> 4 hot swappable 150gb drives and SCSI. IOPS - I'd say average(0.5 with 50mb
> mailbox size) since I don't have a live server to test. What is better, 0+1
> or 1+0?
..25 - .50 IOPS is typical in most environments, from my experience. Also
smaller mailbox limits will decrease the IOPS.
They are the same thing also known as Raid 10.
Or they mean the same? Could you please tell if this hardware setup
> for OS/Logs/DB in raid 1/1/0+1 is good enough or it needs more ram, cpu,
The best practice for Disk layout is to use seperate Disk groups for OS,
Logs, and DB. Since you are limited with your hardware this may not be
possible.
Raid 10 will give you the best performance and fault tolerance. This is the
most expensive way to go but it is needed in large environments with a high
user load and high IOPS. This solution will give you the least amount of
usable space.
Raid 5 will give you fault tolerance, people use this for the DBs and
sometimes OS
Raid 1 will give you some fault tolerance, but the performace is better than
Raid 5, typically people use this for logs
Exchange will only use 4GB of ram, if you use more then its actually just as
bad as not enough (deminishing returns)
> disk space for the DB, especially due peak hours. Also, could you show me
> how do calculate IOPS as I'm totally new to Exchange. Thanks a lot for your
> help.
Typically people look at their exisiting environment to see what they are
using.
It would help me to know how many users you plan on supporting.
Also a little note about Storage Group and Database Design. You want to
keep your database small so in the event of a failure you can recover the DB
quickly.
>
> Cheers,
>
> rick
>
> "Jonathan Norris" wrote in
> message news:916A47D6-9078-4A7C-9FE5-5AB8EA956F94@microsoft.com...
> > Cheers to see you using running Raid 0+1. How many spindles are you using
> > for the DBs?
> >
> > Is it Fibre or Scsi? What is your user profile for IOPS?
> >
> > I can calculate it for you if you want.
> > --
> > Jonathan
> > No Warrenties Implied
> >
> >
> > "rick" wrote:
> >
> >> Hi
> >>
> >> I have both Windows enterprise 2003 SP1 and Exchange enterprise 2003 SP1
> >>
> >> Total of mailboxes=1800
> >> Size of mailbox=50mb
> >>
> >> I'm thinking the following hardware configuration on BE server
> >>
> >> 2*36gb raid 1 for OS, Exchange software, pagefile
> >> 2*36gb raid 1 for transation logs
> >> 4*150gb raid 10 for Database
> >> all hardrives are running at 15K
> >> Server=HP Proliant 570 2*3Ghz Intel Xeon CPUs
> >> HP smart array 6402/128mb controller
> >>
> >> Many thanks for your help!
> >> rick
> >>
> >>
> >>
>
>
>
date: Wed, 21 Dec 2005 14:01:02 -0800
author: Jonathan Norris
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