CMS1000 or CMS Cutomized VM

[Abdelrhman Elmenyawe]

what is the recommended for production deployment?

is it to use CMS1000M6 or Customized specs for CMS with Co-residency?

and if there is a Cisco document confirm which deployment is preferred.

[b.winter]

There is no recommendation. Why should there be one? Both scenarios are supported by Cisco.
CMS1000 has the advantage, that it can handle more calls compared to a CMS-VM on a specs-based server.

[Abdelrhman Elmenyawe]

Hello Winter,

Could u explain how CMS1000 has the advantage, that it can handle more calls compared to a CMS-VM on a specs-based server?

as per cisco document u can customize the vCPU and vRAM to handle whatever number of calls u want 

[b.winter]

That's true. But I didn't say, that you cannot put more vCPUs and vRAM to the specs-based VM.
I just said, that there is no recommendation.