[cisco-voip] Unity and Exchange

Tue Aug 26 13:49:50 EDT 2008

Do you have a link you could provide that has the Microsoft (Ex2K)
specifications?

>>> "Rasim Duric" <rduric at uoguelph.ca> 8/26/2008 12:04 PM >>>

My Unity server is a Platform Overlay 4 (MCS7855I) server and as I
remember it could support up to 7,500 offbox vm subscribers with 72
ports. Our offbox message stores (exchange  2000 servers) are MCS7845H
(2 CPU 2.4 GHZ, 4GB, 4x72GB disks) and I have 2 of these (i.e. around
4,000 subscribers on one Unity server and 2 Exchange servers).
 Per Microsoft (Ex2K) specification you could have around 1,500 email
users on one exchange server. Since Voicemail  is not as heavy as an
email system it is safe to assume this kind of server could support
around 2,000 vm subscribers.
That is at least how we designed our VM infrastructure a few years ago
and it has been working OK.

Rasim Duric
Network Analyst (CCS)
University of Guelph
Guelph, N1G 2W1, ON
519-824-4120x53146
rduric at uoguelph.ca

From:Jason Aarons (US) [mailto:jason.aarons at us.didata.com] 
Sent: August-26-08 11:24 AM
To: Rasim Duric; STEVEN CASPER; cisco-voip at puck.nether.net 
Subject: RE: [cisco-voip] Unity and Exchange

For that model server MCS-7835-H1 the spec sheet list 2000 mailboxes
with 42 ports.  Not sure if cisco licensing knows the server spec and
will issue licenses.  I seem to recall cisco doesn’t have a way to
verify hardware with licenses. Eg you can put 120 ports on a 7825
overlay 1 and they don’t know you got a 7825 when you should have a
overlay 3, etc.
Recall the platform overlay 1, 2, 3 setups for Unity in the
installation guide.

From:cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Rasim Duric
Sent: Tuesday, August 26, 2008 9:42 AM
To: 'STEVEN CASPER'; cisco-voip at puck.nether.net 
Subject: Re: [cisco-voip] Unity and Exchange

Our Exchange offbox servers are the Cisco MCS7845H-EVV1 (HP DL380-G3 )
machines and we also have about 2000 voice mail users per each server.
We have 2 standalone DC/GC servers though. Since cpu utilization is low
on our G3 servers I would say a DL380-G4 should support up to 3000 voice
mail only subscribers without issues.
We also keep deleted messages for 5 days and do the message store
defragmentation once every year which helps in performance and increase
a free disk space.

Rasim Duric
Network Analyst (CCS)
University of Guelph
Guelph, N1G 2W1, ON
519-824-4120x53146
rduric at uoguelph.ca

From:cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of STEVEN
CASPER
Sent: August-26-08 9:01 AM
To: cisco-voip at puck.nether.net 
Subject: [cisco-voip] Unity and Exchange

Hello All,

Running Unity 4.05 with Failover,  Exchange 2000 offbox,  Voice Mail
only config.  My Exchange boxes are DL380 G4's with dual cpu with a lot
of disk space left.  Wondering how many exchange mailboxes these servers
will support before I need to add new Exchange servers. I currently have
about 2000 users on each server and my exchange data base runs about 8 -
9 gb on each server. These servers also act as the DC/GC's for the Unity
standalone AD domain.  I am having no issues but need to plan for the
future. I expect to be upgrading to Unity 7 next year.

Thanks!

Steve
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