[cisco-voip] help explaining UC on UCS CPU requirements

[Nate VanMaren]

Lelio,



Does this mean you're finally getting onto a current CM version?



-Nate

________________________________
From: cisco-voip-bounces at puck.nether.net [cisco-voip-bounces at puck.nether.net] on behalf of Lelio Fulgenzi [lelio at uoguelph.ca]
Sent: Thursday, August 09, 2012 4:14 PM
To: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] help explaining UC on UCS CPU requirements

ok, this note answers my question... sorry for the traffic.

UC apps do not support CPU oversubscription. One VM vCPU must map to one physical core (not one logical core) ( click here<http://docwiki.cisco.com/wiki/Unified_Communications_Virtualization_Sizing_Guidelines> for details).

---
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (ANNU)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Cooking with unix is easy. You just sed it and forget it.
                              - LFJ (with apologies to Mr. Popeil)


________________________________
From: "Lelio Fulgenzi" <lelio at uoguelph.ca>
To: cisco-voip at puck.nether.net
Sent: Thursday, August 9, 2012 5:52:26 PM
Subject: Re: [cisco-voip] help explaining UC on UCS CPU requirements



OK, my reading was wrong for the C240 M3S. It has a total of 16 CPU, so 16x2.7GHz.

So either a total of 8 OVAs based on 1:1 vCPU:pCore, or 12 based on reservation.

The more I'm thinking about it, I'm thinking it's 8 since you want some extra CPU cycles for each server.


________________________________
From: "Lelio Fulgenzi" <lelio at uoguelph.ca>
To: cisco-voip at puck.nether.net
Sent: Thursday, August 9, 2012 3:59:03 PM
Subject: help explaining UC on UCS CPU requirements


I'm wondering if someone can help explain some of the UC on UCS CPU requirements that I'm seeing. I getting a little confused by some of the terminology and stuff in brackets.

When I read the OVA requirements<http://docwiki.cisco.com/wiki/OVA_Template_Details_for_Unified_CM_Release_9.0> for a 7500 user node, it says 2 vCPU (with 3600MHz reservation) and physical load calibrated to E5540 2.53 GHz.

If I want to install this OVA on a UCS C240 M3S (SFF) TRC#1 which has Dual E5-2680 (8-core, 2.7 GHz) do I do some sort of reservation of total CPU Hz available? Or is it simply a 1:1 core assigned, vCPU to pCPU?

The total Hz available is 8x2.7G=21.6GHz which means I could install 21.6/3.6=6 of these OVAs?

Or do you do CPU math, 8/2 = 4 OVAs allowed to be installed?

The math and disk space calculations seem much easier.



---
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (ANNU)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Cooking with unix is easy. You just sed it and forget it.
                              - LFJ (with apologies to Mr. Popeil)



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