Difference between revisions of "Server/Mezz"

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4. Go over a few topics for discussion
4. Go over a few topics for discussion
See below for material for tomorrow's call:
[http://files.opencompute.org/oc/public.php?service=files&t=c6cd05fb6c2046c878ac7c9ddb010e31 Summary of simulation results under stand-by power]
[http://files.opencompute.org/oc/public.php?service=files&t=76c7973c379d6849e7bc0d96eeb95a73 Presentation slides]
--- '''Agenda'''
1. Review latest round of simulation results
2. Go over a few topics for discussion
See below for material for tomorrow's call:
[http://files.opencompute.org/oc/public.php?service=files&t=7d19f143ec3f3109117904caf4a198cc Updated thermal model: Cases A1-A5]
[http://files.opencompute.org/oc/public.php?service=files&t=776e636799258da85c562f69e22e05ae Updated thermal model: Cases A6-A10]
[http://files.opencompute.org/oc/public.php?service=files&t=7018dd736da61bf1a44030d4a582ce26 Updated thermal model: Cases D1-D8]
[http://files.opencompute.org/oc/public.php?service=files&t=b86d25485cf6f4c191c9c2fec2806e73 Summary of simulation results using updated thermal models]
[http://files.opencompute.org/oc/public.php?service=files&t=0f43d212fb481bca0efd5befbed07af1 Presentation slides]
--- '''Agenda'''
1. Review changes to thermal models based on feedback from the community
2. Review latest round of simulation results
3. Go over a few topics for discussion
Here are the update in the past 2x weeks, and material for tomorrow's call:
[http://files.opencompute.org/oc/public.php?service=files&t=5fd1d10bed7d85c6876478a975b7c867 Updated thermal simulation case deck:Thermal Simulation Feedback_20170517]
[http://files.opencompute.org/oc/public.php?service=files&t=9e5450687380a5c97feab23a3c0ccaf3 Update thermal simulation case spreadsheet: Updated Thermal Simulation Cases_20170511]
Additional questions to NIC suppliers:
- Standby(S5) power of NIC, or ratio of P_Standby / P_Max
- P_standby of Optical modules
As we kicked off the discussion of Mezz thermal simulation on 4/19, here are the updates: 
[http://files.opencompute.org/oc/public.php?service=files&t=cd97fcf9d20789a0128cdb4380f26f69 OCP Mezz 3.0 Thermal Simulation Description]
[http://files.opencompute.org/oc/public.php?service=files&t=1a8ba4c5533db8696ea9fd1f5a9d8a8b OCP Mezz 3.0 Thermal Simulation Package]
Please give your feedback in mailing list and we will talk about it on next call on 5/3.
We have an updated schedule for comment and feedback:
[http://files.opencompute.org/oc/public.php?service=files&t=85117a6af40281399d13b87745f2c1ae Schedule Update V2]
Mezz 3.0 Survey is closed with 5 participants; Summary with company names masked can be found here:
[http://files.opencompute.org/oc/public.php?service=files&t=2f76191e6e3f7af67373148de827db77 Mezz 3.0 Survey filled 201704016]
A few updates were made to the master deck:
[http://files.opencompute.org/oc/public.php?service=files&t=a906c9f2492d3d74e1053a4a82ba8331 Mezz 3.0 General Update]
Our next call is on 4/19/2017 Wednesday 9am PDT(2nd call of the month). As always, call-in info can be found [http://opencompute.org/community/ocp-calendars here].
--- '''Agenda'''
1. Sync with community about schedule refresher and get feedback for schedule and milestone
2. Summary of survey
3. John Fernandes will share methodology for thermal simulation
4. Call for more feedback on a few options (9,10,11,12)
1. Ramp NIC survey template version to v03 to have more exact wording.  [http://files.opencompute.org/oc/public.php?service=files&t=888e8eb91172c13653c0bf733ca3b27f Template v03]
2. Due to the limitation of mailing-list with attachment, please send the filled template to [mailto:jia.ning@ocproject.net jia.ning@ocproject.net]. Jia will aggregate and update to the wiki based on your selection of the confidential level (cell B6,B7 of the template v03)
3. [http://files.opencompute.org/oc/public.php?service=files&t=399a90213e5fe9004c79e7bd0be5041e Schedule proposal v01] is available for review and comment. A few notes:
- Overall it includes 3x stages: Information collection => Narrow down direction => work out details and 1st draft
- The v01 schedule is on the aggressive side, i.e. the best case scenario when everything goes as expected.
- Please review it, give inputs in mailing-list, and discuss in the call next week.
An [http://files.opencompute.org/oc/public.php?service=files&t=4baf98af7f736844e149508321370650 improved version of survey template v02] is created.
All NIC suppliers are strongly recommend to participate to influence Mezz 3.0.
Inputs from System supplier and Hyper-scale/CSP are welcome as well.
Agenda for next meeting (4/5)
1. Review overall Mezz 3.0 work schedule
2. Review the boundary with the context of major options
3. Pick major option branches to perform more detailed study
A survey of boundary condition of typical use cases is going on.
Detail see [http://lists.opencompute.org/pipermail/opencompute-mezz-card/2017-March/000003.html here]
Please reply to mailing-list to share your boundary condition of Mezz3.0 or write to [mailto:jia.ning@ocproject.net Jia Ning]
1. [https://www.youtube.com/watch?v=M9vg974Ww_4 Video of 3/17/2017 OCP Server workshop talk - Mezz 2.0 and beyond]
2. [http://files.opencompute.org/oc/public.php?service=files&t=6f58019848967b203deefef128c0aa04 Slide deck of 3/9/2017 workshop ]
3. [http://files.opencompute.org/oc/public.php?service=files&t=98ba555198e7083741fefbbf6794c12d Visco file for placement study]

Revision as of 08:01, 26 July 2017


Welcome to the OCP Mezzanine NIC subgroup under OCP Server Work Group. The goal of this subgroup is to form a healthy ecosystem in Mezzanine NIC space, under OCP framework.


We are here to build a supportive, informative and inclusive community:


- Support implementation questions

- Evaluate new use cases


- Share the latest topics and trends related to OCP Mezz NIC spec

- Share both challenges and opportunities


- Take community feedback and make iterations to proposal before submitting major revision to work group and IC

- Open to both adopters, and observers

Get Involved



1. Update to deck

Master Deck V5 dated 7/25


1. Update to deck

Master Deck V5 dated 7/14

2. Update to Schedule

Schedule update v3 dated 7/14

3. Mezz subgroup will meet @ OCP Engineering workshop Sep 25th, 2017

More info here


See below material for tomorrow's call:

Corrected thermal model: Cases A1-A5

Corrected thermal model: Cases A6-A10

Thermal model with QSFP heat sink: Cases A1-A5

Thermal model with QSFP heat sink: Cases A6-A10

Summary of updated simulation results

Presentation slides

--- Agenda

1. Updates and corrections to thermal models

2. Impact of QSFP heat sink

3. Impact of contact resistance on QSFP heat sink performance

4. Go over a few topics for discussion

Find Archive of updates here

Find archive of mailing-list here


This project meets - 2 times a Month; Defaults to 1st and 3rd Wednesday of the Month.

Call-in info and source of truth @ http://opencompute.org/community/ocp-calendars (Time zone shown: Eastern Time)

This call is open to the public.

If there is a cancellation, we will try our best to cancel >24hrs before the meeting by the calendars above.

Meeting minutes is sent out in mailing list and can be found at archive



OCP Engineering Workshop Sessions https://ocpussummit2017.sched.com/event/9SAa/ocp-mezzanine-nic-20-and-beyond

More information about OCP events can be found at: http://www.opencompute.org/community/events/ocp-events-calendar


- Project communication is done through the opencompute-mezz-card mailing list.

- Please make sure following the steps until you receive confirmation email and welcome email from Opencompute-mezz-card@lists.opencompute.org.

Please check your junk box and unblock Opencompute-mezz-card@lists.opencompute.org if you have trouble getting confirmation email.

- To access the mailing list archives go to: http://lists.opencompute.org/pipermail/opencompute-mezz-card/

- For general discussion, please use mailing-list above by default; This is public domain and all discussion is archived

- Reach to Jia Ning if there is strong reason not to have public discussion

Specifications and Designs

All these accepted by the IC

Specification Version Submit Date Contributor License Notes
OCP Mezzanine card v2.0


OCP_Mezz_2.0_rev1.00_20151215b_pub_release_3D_package.zip (88MB)

Mechanical 20151023_P1-P9_K1-K5 zip file (57MB)

V2.0-1.0 Dec 15, 2015 Facebook OWFa 1.0 Added support for x16 (quad x4), NCSI, dual QSFP+, & Quad SDP+

Accepted by OCP IC 2/24/2016

OCP Mezzanine card v0.5, original standard

Mezzanine Card (rev 0.5)

V0.5 Oct 8, 2012 Facebook OWFa 1.0 Defacto standard for the original network mezzanine with a x8 PCIe Gen3 interface