[cisco-voip] Server Sizing

[Thomas LeMay]

Hi, Wes,

 

Out of the box, the 7845 servers are configured to support 5000 devices.  I
know that one can increase the maximum per server to 7500.  Are there any
guidelines as to exactly what % of the maximum 7500 one should configure on
the server?  In other words should one configure 80% of the maximum 7500?
What is the best practice for how many devices to have on a server?

 

Thank you,

 

Tom

 

  _____  

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Wes Sisk
Sent: Thursday, May 12, 2011 1:36 PM
To: Daniel
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Server Sizing

 

Daniel,

Thanks for clarifying that.

A bit of disclaimer: participation in this mailer comes with no warranty,
validation, our guarantee.  This is helping out in a community. For formal
design guidance contact your Cisco account team.

TFTP and IPVMS in general will consume less resources.  TFTP mostly requires
memory and CPU for building and caching files in memory. IPVMS mostly
requires CPU for originating and mixing audio streams.


Otherwise to your question:
What would be the recommended architecture for subscribers?
- Currently looking at having 3 x 7845 for Subs for about 7500 phones
including Softphones

Option#1
- 2 CCM Groups to have all phones split 50-50
                CUCM Group1                  CUCM Group2
                Sub A                                    Sub B
                Sub B                                     Sub A
                Sub C                                     Sub C

Option#2
- 2 CCM Groups to have all phones split 50-50
                CUCM Group1                  CUCM Group2
                Sub A                                    Sub B
                Sub C                                     Sub C
                Sub B                                     Sub A


In Option #1 if SubA goes down then SubB is hosting all of Group2 and
concurrently attempting to register all phones from Group1. That could be a
bottle neck. It could cause Group2 to affect service for Group1.  This risk
arises with only 1 failure (either SubA or SubB fails).

In Option#2 if SubA and SubB fail then SubC has to register all phones. This
risk arises with 2 failures (SubA fails AND SubB fails).

Regards,
Wes


On 5/10/2011 10:41 PM, Daniel wrote: 

The publisher is not running any call processing. 

 

I was asking for opinions on sizing the last two TFTP and IPVMS servers with
less resources.

 

 

On Wed, May 11, 2011 at 11:18 AM, Wes Sisk <wsisk at cisco.com> wrote:

With more than 3 nodes in the cluster the publisher generally should not run
call processing. It should be a dedicated publisher.

Regards,
Wes 



On 5/10/2011 5:48 PM, Daniel wrote: 

Hi Guys, 

 

I'm setting up a new cluster that has 7 nodes, publisher, 4 subscribers, and
2 dedicated servers with each running TFTP and IPVMS.

 

This is all UC on UCS. The publisher and subscirbers have been setup with
the 7500 user OVA/F file. I would like to get peoples thoughts on setting
the last two servers that are each running TFTP and IPVMS only (no call
processing) to be setup with the 2500 user OVA/F file?

 

It will use less space from our SAN etc.. does it need to be the same size
since they're not doing call processing?

 

cheers,

 

Dan

 
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