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:This Project is open to the public and we welcome all those who would like to be involved. | :This Project is open to the public and we welcome all those who would like to be involved. | ||
:Time is | :Time is a key element to get the highest efficiency in a distributed system. The performance of a distributed system depends on the synchronization of its elements. Several industries such as telecom, mobile, power, industrial, professional audio and video and many more have embraced the need for highly accurate and more importantly reliable distribution and synchronization of time and frequency across packet networks. Although the use case scenario for each of the industries is different, they all share one common thing and that is, time synchronization. Since there is a diverse need for time synchronization across different industries, driven from different use cases and applications, managing the needs of this industry chain becomes a challenge. | ||
Time Appliances Project (TAP) aims to provide a platform to bring together | Time Appliances Project (TAP) aims to provide a platform to bring together, discuss, standardize and share technologies and solutions across industries with the datacenter applications and datacenter network infrastructure as the main interest. The project aims to bring together the community of datacenter operators, application developers, and equipment and semiconductor companies together to enable datacenter time-sensitive applications such as consistency in distributed systems, edge computing, AR/VR and IoT. These applications will greatly benefit from high accuracy, reliable, and scalable distribution and synchronization of time. | ||
IEEE 1588 Precision Timing Protocol (PTP) and other synchronization methods have been adopted by various industries to maximize the efficiency of various distributed system use cases. Each use case scenario comes with a set of requirements and configurations. These configurations are collected as a ‘PTP profile’. Time appliances project aims to support the development of a PTP profile for datacenter applications and datacenter network infrastructure. The profile will cover time-sensitive applications over OCP-compliant and PTP-aware networking infrastructure such as network switches, network clocks, network interface cards, timing modules & connectors, etc. Additionally, the profile will address various requirements for high accuracy and reliable distribution and synchronization of time, such as expected performance, networking, software API, data models, deployment and telemetry. The project also aims at openness and interoperability through the use of open-source PTP software implementations for timing appliances. | IEEE 1588 Precision Timing Protocol (PTP) and other synchronization methods have been adopted by various industries to maximize the efficiency of various distributed system use cases. Each use case scenario comes with a set of requirements and configurations. These configurations are collected as a ‘PTP profile’. Time appliances project aims to support the development of a PTP profile for datacenter applications and datacenter network infrastructure. The profile will cover time-sensitive applications over OCP-compliant and PTP-aware networking infrastructure such as network switches, network clocks, network interface cards, timing modules & connectors, etc. Additionally, the profile will address various requirements for high accuracy and reliable distribution and synchronization of time, such as expected performance, networking, software API, data models, deployment and telemetry. The project also aims at openness and interoperability through the use of open-source PTP software implementations for timing appliances. | ||
Datacenter applications are the primary target of time appliances project. In addition, the project extends to related topics on time synchronization in academia, research and other industries. The time appliances project brings together the community and will be highly collaborative through technical meetings and collaboration with other OCP Projects including the Networking, Storage, Server, and Telco Projects. | Datacenter applications are the primary target of time appliances project. In addition, the project extends to related topics on time synchronization in academia, research and other industries. The time appliances project brings together the community and will be highly collaborative through technical meetings and collaboration with other OCP Projects including the Networking, Storage, Server, and Telco Projects. | ||
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==Project Leadership== | ==Project Leadership== | ||
:- | Leads: | ||
:- | :- [mailto:ahmad.byagowi@ocproject.net Ahmad Byagowi] (Facebook) | ||
:- [mailto:elad@nvidia.com Elad Wind] (NVIDIA) | |||
Interim IC Rep: | |||
:- [mailto:rajeev@opencompute.org Rajeev Sharma] (OCP) | |||
==Workstreams== | === Workstreams === | ||
{| class="wikitable | {| class="wikitable" | ||
|- | |- | ||
! | ! | ||
! Project | ! Project | ||
! Objective | |||
! POC | |||
! Meeting Schedule | |||
|- | |- | ||
| | | #1 | ||
| | | Open Source Grandmaster | ||
| Development of an open | | Development of an open source grandmaster for DC and Edge systems | ||
| [mailto: | | [mailto:leoleovich@fb.com Oleg Obleukhov] & <br> [mailto:dotanl@nvidia.com Dotan Levi] | ||
| | | discussed during project call | ||
|- | |- | ||
| | | #2 | ||
| | | Data Center PTP Profile | ||
| Development of a PTP Profile tailored for data center applications | | Development of a PTP Profile tailored for data center applications | ||
| [mailto:michelouellette@ | | [mailto:michelouellette@fb.com Michel Ouellette] | ||
| | | discussed during project call | ||
|- | |- | ||
| | | #3 | ||
| | | Precision Time API | ||
| Time APIs to disseminate the time error (error bound) and bring accurate time to the user space | | Time APIs to disseminate the time error (error bound) and bring accurate time to the user space | ||
| [mailto:gemicha@gmail.com Georgi Chalakov] | | [mailto:gemicha@gmail.com Georgi Chalakov] | ||
| | | discussed during project call | ||
|- | |- | ||
| | | #4 | ||
| | | Oscillators | ||
| Classification and measuring of oscillators | | Classification and measuring of oscillators | ||
| [mailto:ggiust@sitime.com Gary Giust | | [mailto:ggiust@sitime.com Gary Giust] | ||
| | | discussed during project call | ||
|- | |- | ||
| | | | ||
| Overall | |||
| Project meeting coordinator | |||
| [mailto:kelvinchukwu@fb.com Kelvin Chukwu] | |||
| please send all inquiries to Kelvin | |||
| | |||
| | |||
| | |||
| | |||
|} | |} | ||
==Get Involved== | ==Get Involved== | ||
:- [https://ocp-all.groups.io/g/OCP-TAP TAP Mailing List] | :- [https://ocp-all.groups.io/g/OCP-TAP TAP Mailing List] | ||
:- [ | :- [http://opencompute.org/projects/projects-calendar/ OCP Projects Calendar] | ||
==Documents== | ==Documents== | ||
:- | :- OCP Presentation Template - please contact [mailto:michael@opencompute.org Michael Schill] or [mailto:archna@opencompute.org Archna Haylock] for a copy | ||
Release Candidates (RC) Docs | |||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
! Name | |||
! Format | |||
! Version | |||
! Date | |||
! Contributor | |||
! Link | |||
|- | |- | ||
| | | Open Source Grandmaster | ||
| | | MD | ||
| [https://github.com/opencomputeproject/Time-Appliance-Project/ | | v0.1 | ||
| Nov-23, 2020 | |||
| OCP TAP | |||
| [https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Time-Card/DOC GitHub] | |||
|- | |- | ||
| [https:// | | Data Center PTP Profile | ||
| PDF | |||
| v0.1 | |||
| Nov-27, 2020 | |||
| OCP TAP | |||
| [https://www.dropbox.com/s/kerae9jxgtkui8s/OCP_DCPTP_Profile_v0.1_draft_for_review.pdf?dl=0 Dropbox] | |||
|- | |- | ||
|} | |} | ||
==TAP GitHub== | |||
:- [https://github.com/opencomputeproject/Time-Appliance-Project Github Repo] | |||
==TAP Google Drive== | |||
:- [https://drive.google.com/drive/folders/1EDE9Pj1eZj2sF7fUGOnVmwGTf4U6yonr?usp=sharing Google Drive Document Repository] | |||
==Regular Project Calls== | ==Regular Project Calls== | ||
:- Wednesdays at 11am PST, starting on July 15th, 2020. Repeats every 2 weeks following that | |||
:- Please contact [mailto:kelvinchukwu@fb.com Kelvin Chukwu] to propose any agenda items | |||
Join the meeting from your computer, tablet or smartphone: | Join the meeting from your computer, tablet or smartphone: | ||
https://global.gotomeeting.com/join/565185493 | |||
Dial in | Dial in: | ||
United States (Toll Free): +1 877 309 2073 | |||
United States: +1 571 317-3129 | |||
Access Code: 565-185-493 | |||
== | ==Recordings from Past Calls== | ||
{| class="wikitable | {| class="wikitable" | ||
|- | |- | ||
! | ! | ||
! Date ! | ! Date | ||
! Meeting | |||
! Slides | |||
|- | |- | ||
| #18 | | #18 | ||
| | | March 24th, 2021 | ||
| [https://www.youtube.com/watch?v=5zMdYlPipXU Introduction to Project Corundum for Time services | | [https://www.youtube.com/watch?v=5zMdYlPipXU Introduction to Project Corundum for Time services <BR> by Alex Forencich] | ||
| | |||
| | |||
|- | |- | ||
| #17 | | #17 | ||
| | | March 10th, 2021 | ||
| [https://www.youtube.com/watch?v=cYNAyCC53sc Oscillators Classification | | [https://www.youtube.com/watch?v=cYNAyCC53sc Oscillators Classification - Workstream #4 goals and kickoff] | ||
| [https://drive.google.com/file/d/1O2iMLKKRqtesziBLPQ9PTh23Yyg_Efx2/view?usp=sharing Slides] | | [https://drive.google.com/file/d/1O2iMLKKRqtesziBLPQ9PTh23Yyg_Efx2/view?usp=sharing Slides] | ||
|- | |- | ||
| #16 | | #16 | ||
| | | February 24th, 2021 | ||
| [https://www.youtube.com/watch?v=NJRsd-1gzx8 GNSS Timing | | [https://www.youtube.com/watch?v=NJRsd-1gzx8 GNSS Timing,<BR> by Samuli Pietila] | ||
| | | | ||
|- | |- | ||
| #15 | | #15 | ||
| | | February 10th, 2021 | ||
| [https://www.youtube.com/watch?v=WcWOapT_rZw Centralized GNSS Monitoring and Assurance | | [https://www.youtube.com/watch?v=WcWOapT_rZw Centralized GNSS Monitoring and Assurance,<BR> by Nir Laufer] | ||
| [https://drive.google.com/file/d/11iWllqXTSWFuXR3p53nk4o4DNDCqBUa6/view?usp=sharing Slides] | | [https://drive.google.com/file/d/11iWllqXTSWFuXR3p53nk4o4DNDCqBUa6/view?usp=sharing Slides] | ||
|- | |- | ||
| #14 | | #14 | ||
| | | January 27th, 2021 | ||
| [https://www.youtube.com/watch?v=-uNaQENycMA Huygens and its Applications | | [https://www.youtube.com/watch?v=-uNaQENycMA Huygens and its Applications,<BR> by Prof. Balaji] | ||
| | | | ||
|- | |- | ||
| #13 | | #13 | ||
| | | January 13th, 2021 | ||
| [https://www.youtube.com/watch?v=N9KoaOonvzM TAP 2020 Recap, 2021 Plans] | | [https://www.youtube.com/watch?v=N9KoaOonvzM TAP 2020 Recap, 2021 Plans] | ||
| [https://drive.google.com/file/d/1H16HOlaNx4C72A3odW-Lc4_F-yrDAi_M/view?usp=sharing Slides] | | [https://drive.google.com/file/d/1H16HOlaNx4C72A3odW-Lc4_F-yrDAi_M/view?usp=sharing Slides] | ||
|- | |- | ||
| | |||
| | | | ||
| | |||
| | |||
|- | |- | ||
| #12 | | #12 | ||
| | | December 16th, 2020 | ||
| [https://www.youtube.com/watch?v=Niu5pQ6QZ88 Chip Scaled Atomic Clocks | | [https://www.youtube.com/watch?v=Niu5pQ6QZ88 Chip Scaled Atomic Clocks,<BR> by John Kitching] | ||
| [https://drive.google.com/file/d/1wbp7ZlPDmCtxvjqx0dyiY8MA9jOz75bu/view?usp=sharing Slides] | | [https://drive.google.com/file/d/1wbp7ZlPDmCtxvjqx0dyiY8MA9jOz75bu/view?usp=sharing Slides] | ||
|- | |- | ||
| #11 | | #11 | ||
| | | December 2nd, 2020 | ||
| [https://www.youtube.com/watch?v=rVZbEKOE6jo Data Center PTP Profile, | | [https://www.youtube.com/watch?v=rVZbEKOE6jo Data Center PTP Profile, Workstream #2 proposal] | ||
| | |||
| | |||
|- | |- | ||
| #10 | | #10 | ||
| | | November 18th, 2020 | ||
| [https://www.youtube.com/watch?v=-_cdud9nSgA Computer Timekeeping and Synchronization | | [https://www.youtube.com/watch?v=-_cdud9nSgA Computer Timekeeping and Synchronization,<BR> by Kevin Stanton, Ph.D.] | ||
| [https://drive.google.com/file/d/12J7785mAmjNo9TsI3jZ11-QuRsDDDIIO/view?usp=sharing Slides] | | [https://drive.google.com/file/d/12J7785mAmjNo9TsI3jZ11-QuRsDDDIIO/view?usp=sharing Slides] | ||
|- | |- | ||
| # | | #9 | ||
| | | November 4th, 2020 | ||
| [https://www.youtube.com/watch?v=rUDHKJCI3n4 Time Sync in TSNs] | | [https://www.youtube.com/watch?v=rUDHKJCI3n4 Time Sync in TSNs] | ||
. History of TSN <BR> | |||
. IEEE 802.1AS Overview | |||
| [https://drive.google.com/file/d/1y1ds3bGuJcNRlHgVnmjQGeXhCfZ5sy4q/view?usp=sharing Slides] | | [https://drive.google.com/file/d/1y1ds3bGuJcNRlHgVnmjQGeXhCfZ5sy4q/view?usp=sharing Slides] | ||
|- | |- | ||
| # | | #8 | ||
| | | October 21st, 2020 | ||
| [https://www.youtube.com/watch?v=cUPv1Gdvv9A Starter's guide to ptp4l] | | [https://www.youtube.com/watch?v=cUPv1Gdvv9A Starter's guide to ptp4l] | ||
| [https://drive.google.com/file/d/10GT5zVZTPChbUTnlSt9dbb4J0fesHBJi/view?usp=sharing Slides] | | [https://drive.google.com/file/d/10GT5zVZTPChbUTnlSt9dbb4J0fesHBJi/view?usp=sharing Slides] | ||
|- | |- | ||
| # | | #7 | ||
| | | October 7th, 2020 | ||
| [https://www.youtube.com/watch?v=FIuazsKx7VY&feature=youtu.be Timing card implementation] | | [https://www.youtube.com/watch?v=FIuazsKx7VY&feature=youtu.be Timing card implementation] | ||
| | |||
| | |||
|- | |- | ||
| # | | #6 | ||
| | | September 23rd, 2020 | ||
| [https://www.youtube.com/watch?v=Xzh3JUzbz4I Practical Use Cases of Synchronized Clocks] | | [https://www.youtube.com/watch?v=Xzh3JUzbz4I Practical Use Cases of Synchronized Clocks] | ||
| | | | ||
|- | |- | ||
| # | | #5 | ||
| | | September 9th, 2020 | ||
| [https://www.youtube.com/watch?v=5XJXEztSDl4 | | [https://www.youtube.com/watch?v=5XJXEztSDl4 PTP workstream #2 goals and draft spec] | ||
| | |||
| | |||
|- | |- | ||
| # | | #4 | ||
| | | August 26th, 2020 | ||
| [https://www.youtube.com/watch?v=vc1IUOw0Q4k Open Grandmaster | | [https://www.youtube.com/watch?v=vc1IUOw0Q4k Open Grandmaster workstream goals and draft spec] | ||
| | | | ||
|- | |- | ||
| # | | #3 | ||
| | | August 12th, 2020 | ||
| [https://www.youtube.com/watch?v=INEbH7Q_d1c TAP Vision | | [https://www.youtube.com/watch?v=INEbH7Q_d1c A. TAP Vision <BR> B. Impact of Precision Oscillator Noise on PTP Time Error ] | ||
| | | | ||
|- | |- | ||
| # | | #2 | ||
| | | July 29th, 2020 | ||
| [https://www.youtube.com/watch?v=t7eo3Aya35c Detailed Project Proposal and Discussion] | | [https://www.youtube.com/watch?v=t7eo3Aya35c Detailed Project Proposal and Discussion] | ||
| | | | ||
|- | |- | ||
| # | | #1 | ||
| | | July 15th, 2020 | ||
| [https://www.youtube.com/watch?v=WmMM0b38mIM Proposal to launch OCP-TAP Incubation Project] | | [https://www.youtube.com/watch?v=WmMM0b38mIM Proposal to launch OCP-TAP Incubation Project] | ||
| | | | ||
|} | |} | ||
== Presentations & | ==Presentations & Videos== | ||
:- [https://drive.google.com/file/d/1WAUl4JVaakqCY8e7yZlQiz5j6NhMkHPb/view?usp=sharing | :- [https://drive.google.com/file/d/1WAUl4JVaakqCY8e7yZlQiz5j6NhMkHPb/view?usp=sharing OCP TAP - Vision] | ||
:- [https://drive.google.com/file/d/1LC5Ld0r3U7us_jvmKeD_ZpBJaA7Kk0O4/view?usp=sharing | :- [https://drive.google.com/file/d/1LC5Ld0r3U7us_jvmKeD_ZpBJaA7Kk0O4/view?usp=sharing TAP Presentation] | ||
:- [https://drive.google.com/file/d/16EAy8Tl7SqosLlGSg5WKEA4nexWjUlAg/view?usp=sharing Impact of Oscillator Noise on PTP Time Error – Part 1] | |||
:- [https://drive.google.com/file/d/1Kc5JdHdd2nchxbXNGm2XyBj-pXUkHk9N/view?usp=sharing Impact of Oscillator Noise on PTP Time Error – Part 2] | |||
:- [https://drive.google.com/file/d/1TbPzJH1iiTTkr1Uy9B60Vo2h-v7l4S90/view?usp=sharing ELPROMA TAP Remarks Oct 7 2020] | |||
==Recordings from Workstream Calls== | |||
{| class="wikitable" | |||
|- | |||
! Workstream | |||
! Date | |||
! Meeting | |||
! Slides | |||
|- | |||
| #4 Oscillators | |||
| March 18th, 2021 | |||
| [https://drive.google.com/file/d/12WmaGkLF1IUjLaAhXSzVp33pzmlYMA4J/view?usp=sharing Recording] | |||
| [https://drive.google.com/file/d/1O2iMLKKRqtesziBLPQ9PTh23Yyg_Efx2/view Slides] | |||
|} | |||
== References & External Links == | |||
:- [https://storage.googleapis.com/pub-tools-public-publication-data/pdf/45855.pdf | :- [https://storage.googleapis.com/pub-tools-public-publication-data/pdf/45855.pdf Spanner, TrueTime & The CAP Theorem] by Eric Brewer, Google | ||
:- [http://www.dainf.cefetpr.br/~tacla/SDII/PracticalUseOfClocks.pdf Practical Uses of Synchronized Clocks in Distributed Systems] by Barbara Liskov | :- [http://www.dainf.cefetpr.br/~tacla/SDII/PracticalUseOfClocks.pdf Practical Uses of Synchronized Clocks in Distributed Systems] by Barbara Liskov | ||
:- [https://ocp-all.groups.io/g/OCP-TAP/attachment/2/0/nsdi18-geng.pdf Stanford Paper] | :- [https://ocp-all.groups.io/g/OCP-TAP/attachment/2/0/nsdi18-geng.pdf Stanford Paper] for reference only | ||
:- [https://arxiv.org/pdf/2002.04269.pdf On Time Synchronization Issues in Time-Sensitive Networks with Regulators and Nonideal Clocks] | :- [https://static.googleusercontent.com/media/research.google.com/en//archive/spanner-osdi2012.pdf Spanner Paper] for reference only | ||
:- [https://drive.google.com/file/d/11MFIk9WWJ-cmjj8uWifKQnefEKvdchZE/view?usp=sharing Accurate Network Clock Synchronization at Scale] | :- [https://arxiv.org/pdf/2002.04269.pdf On Time Synchronization Issues in Time-Sensitive Networks with Regulators and Nonideal Clocks] for reference only, raised by Elad | ||
:- [https://drive.google.com/file/d/1dpuhsC3aPNpJHD-iw0xq4K0cDjEMGG4q/view?usp=sharing Exploiting a Natural Network Effect for Scalable, Fine-grained Clock Synchronization] | :- [https://drive.google.com/file/d/11MFIk9WWJ-cmjj8uWifKQnefEKvdchZE/view?usp=sharing Accurate Network Clock Synchronization at Scale] for reference only, raised by Hesham | ||
:- [https://drive.google.com/file/d/1OSdZfRiGYKSntjhorKdPtoP1ewQ_yKVW/view?usp=sharing SIMON: A Simple and Scalable Method for Sensing, Inference and Measurement in Data Center Networks] | :- [https://drive.google.com/file/d/1dpuhsC3aPNpJHD-iw0xq4K0cDjEMGG4q/view?usp=sharing Exploiting a Natural Network Effect for Scalable, Fine-grained Clock Synchronization] for reference only, raised by Hesham | ||
:- [https://www.opencompute.org/blog/open-compute-project-foundation-issues-new-guidelines-for-inclusiveness New Guidelines for Inclusiveness] | :- [https://drive.google.com/file/d/1OSdZfRiGYKSntjhorKdPtoP1ewQ_yKVW/view?usp=sharing SIMON: A Simple and Scalable Method for Sensing, Inference and Measurement in Data Center Networks] for reference only, raised by Hesham | ||
:- [https://www.opencompute.org/blog/open-compute-project-foundation-issues-new-guidelines-for-inclusiveness New Guidelines for Inclusiveness] for reference only, raised by Michael |