[cisco-voip] CUCM Cluster Expansion

[NateCCIE]

I always do the 7.5k cucm size.  I hate single cpu cucm, ram is usually not a problem and I’d rather have the 110GB disk because upgrades about never work on the 80gb without clearing some space.  Even 110GB has become a problem lately. 

Sent from my iPhone

> On Feb 13, 2020, at 3:29 PM, Ryan Huff <ryanhuff at outlook.com> wrote:
> 
> 
> For 11.x, but I've found this helpful: https://www.cisco.com/web/software/283088407/126036/cucm-11.0.ova.readme.txt
> 
> Thanks,
> 
> Ryan
> From: Matthew Loraditch <MLoraditch at heliontechnologies.com>
> Sent: Thursday, February 13, 2020 5:24 PM
> To: Ryan Huff <ryanhuff at outlook.com>; cisco-voip at puck.nether.net <cisco-voip at puck.nether.net>
> Subject: RE: CUCM Cluster Expansion
>  
> Yeah, I’m just trying to understand (as I read the ovf file) what the actual difference is between the 1000/2500 user OVA. I seem to be missing something (or maybe not). CPU is actually 1 less starting but same reservation, same RAM, same HDD.
>  
>  	
> Matthew Loraditch​
> Sr. Network Engineer
> p: 443.541.1518
> w: www.heliontechnologies.com	 | 	e: MLoraditch at heliontechnologies.com
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> From: Ryan Huff <ryanhuff at outlook.com> 
> Sent: Thursday, February 13, 2020 5:21 PM
> To: Matthew Loraditch <MLoraditch at heliontechnologies.com>; cisco-voip at puck.nether.net
> Subject: Re: CUCM Cluster Expansion
>  
> [EXTERNAL]
>  
> I wouldn't see a reason not to just up-size the two nodes you have now to the 2.5k OVA (use 2 vCPU on each node). For the 15 pieces of flair, I'd then add in a 3rd 2.5k OVA w/o the CCM service enabled and run TFTP.. etc on it and give the pub a break.
>  
> -Ryan
>  
> From: cisco-voip <cisco-voip-bounces at puck.nether.net> on behalf of Matthew Loraditch <MLoraditch at heliontechnologies.com>
> Sent: Thursday, February 13, 2020 5:10 PM
> To: cisco-voip at puck.nether.net <cisco-voip at puck.nether.net>
> Subject: [cisco-voip] CUCM Cluster Expansion
>  
> One of my biggest customers is experiencing issues that appear to be related to resource utilization. I’ve never had a customer who needed more than a 2 node 1000 user cluster.
>  
> They are getting close to some of the capacity levels listed in the sizing guides.
>  
> I’m looking for some opinions on what the best way to deal with this. I have the hardware capacity for either method.
>  
> Add a Third 1000 user Subscriber and turn off call processing and tftp on the Pub?
>  
> Rebuild both existing servers to 2500 user OVAs?
>  
> Add a third and do the rebuild also?
>  
> Can I just make the existing server be the 2500 capacity level? I actually don’t understand the difference between the 2500 and 1000 user OVAs, the 2500 appears to actually be lesser capacity by default (1 less cpu). So go to 7500?
>  
> I’d appreciate any opinions out there. Going to be doing some reading over the next few days to try and figure this out.
>  
> Thanks all!
>  
> Matthew Loraditch​
> Sr. Network Engineer
> p: 443.541.1518
> w: www.heliontechnologies.com
>  | 
> e: MLoraditch at heliontechnologies.com
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