Composable Memory System

Composable Memory System (CMS) is a Sub-Project under the OCP Server Project. It was created when the OCP Future Technologies Initiative's Software Defined Memory workstream transitioned into a new OCP Sub-Project, now called Composable Memory Systems. Details about the Sub-Project's mission, leadership, scope and ways to get involved will be added in the near future.

Composable Memory System

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Steering Committee Representative

Gregory D Sellman

Project Leads

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About This Sub-Project

Composable Memory System (CMS) is a Sub-Project under the OCP Server Project.

The Sub-Project was created when the OCP Future Technologies Initiative’s Software Defined Memory workstream transitioned into a new OCP Sub-Project, now called Composable Memory Systems.

Scope

The scope of this Sub-Project will be added in the near future.

Resources

The OCP Composable Memory System is a sub-project within the Server project.

CMS was created based on the work of the SDM team from the OCP Future Technologies Initiative. History can be found in the FTI-SDM Wiki

CMS Tech Day 2025

Sub-Projects

– Composability Fabric Manager (CFM) – Composable Memory Appliance (CMA)

Workstreams

There are 5 workstreams in the project:

– Composable Workloads (Vikrant Soman, Uber) – DC Memory Fabric Orchestration (Anjaneya “Reddy” Chagam, Intel) – AI & HPC Systems & Fabric (Manoj Wadekar, Meta & Samir Rajadnya, Microsoft) – Computational Programming (Pankaj Mehra, Elephance Memory) – Academia Research (Brian Hirano, Micron)

Workgroup Documents

Whitepapers

Specification Contributions

Github Contributions

Recordings from Past Calls

Past CMS Events

2025
  • Jun 27, 2025 (recording no longer available)
  • Apr 25, 2025 (recording no longer available)
  • Mar 14, 2025 – Unable to post to YouTube
  • Mar 07, 2025 – Unable to post to YouTube
2024
2023
  • Apr 19, 2023 (Not Recorded)

Archived documents

Type Description Version Submit Date Contributor License Notes
Proposal Converged Memory Systems (CMS) sub-project proposal

SDM Update Global OCP 2022
2022-10-7 SDM Scope – Final

 n/a 10/27/2022 Manoj Wadekar (Meta) n/a Discussed in 11/30 Server Project call
Proposal SFF-TA-1034 CMM Proposal

Video recording 12/14/2022

n/a 12/07/2022 and 12/14/2022 Anant Thakar (Cisco) n/a Discussed in 12/07 and 12/14 CMS Project calls
Proposal Memory Pooling Challenges

Memory Pooling Challenges

n/a 01/04/2023 Mahesh Wagh (AMD) n/a Discussed in 01/04 CMS Weekly call
Proposal A framework to create specification related to memory pooling and memory expansion n/a 01/11/2023 Samir Rajadnya (Microsoft) n/a Discussed in 01/11 and 01/25 CMS Weekly call
Proposal Memory Access Tracking – baseline proposal n/a 02/01/2023 Anjaneya (Reddy) Chagam (Intel) n/a To be Discussed in 02/01 CMS Weekly call
Proposal Chameleon and Hotness tracking in TPP n/a 02/15/2023 Abhishek Dhanotia, Johannes Weiner (Meta) n/a Discussed in 02/15 CMS Weekly call
Proposal CMS:Scope Discussion n/a 02/22/2023 Manoj Wadekar(Meta) n/a Discussed in 02/22 CMS Weekly call

Regular Project Calls

This project meets once a week via a conference call every Friday at 9AM-PT / 11AM-CT / 12pm-ET / midnight-China(winter) / 12pm-China(summer) please check the call calendar for any updates.

– Agendas will be sent out to the [[email protected]] before each meeting – Check the CMS groups.io page for joining mail list, calendar updates etc. – Call Link Meeting ID: 875 2313 7632 Passcode: 701044

You can also dial in using your phone: +16469313860,,87523137632# US

Composable Memory System calendar

Related Details

Contributions

All project contributions

Sub-Projects

Academia Research

Academia Research is a Workstream under the Composable Memory System (CMS) Sub-Project of the OCP Server Project. It tracks current academic systems research in composable, heterogeneous, and disaggregated memory, such as CXL, and shares findings with CMS participants. The workstream invites key researchers to present to the CMS community and fosters their participation in OCP events such as the Global Summit. It aims to provide industry feedback and guidance to researchers and, in the future, to fund research in areas of interest to CMS, and it curates lists of CMS-relevant papers from top conferences.

AI & HPC Systems and Fabric

AI & HPC Systems and Fabric is a Workstream under the Composable Memory System (CMS) Sub-Project of the OCP Server Project. The CMS Sub-Project grew out of the Future Technologies Initiative’s Software Defined Memory workstream. Details about the workstream’s mission, scope, deliverables, and ways to get involved will be added in the near future.

Composability Fabric Manager Software

Composability Fabric Manager (CFM) Software is a team within the Composable Memory System (CMS) Sub-Project of the OCP Server Project. It explores standards-based expansion of features for future Composable Memory Appliance (CMA) architectures. The initial CMA/CFM contribution included the basic provisioning and composition components of the CFM, including Redfish composition services, the Redfish API, and a CLI and GUI. The team’s charter is to optimize these components and APIs through the open-source community while adding container memory provisioning, dynamic capacity controls, and performance and quality-of-service management. Code is published on GitHub.

Composable Memory Appliance Hardware

Composable Memory Appliance (CMA) Hardware is a team within the Composable Memory System (CMS) Sub-Project of the OCP Server Project. Building on the initial CMA CLA contribution, it explores and standardizes next-generation enhancements that reduce cost, improve latency and bandwidth, and increase the number of clustered nodes that can connect to a pooled memory appliance. Its charter is a TCO-optimized answer to the memory-wall and stranded-resource challenge: CXL pooled memory with non-blocking bandwidth and round-trip latency under 400 ns, while improving sustainability through DDR4 recycling and lower power per GB.

Composable Workloads

Composable Workloads is a Workstream under the Composable Memory System (CMS) Sub-Project of the OCP Server Project. The CMS Sub-Project grew out of the Future Technologies Initiative’s Software Defined Memory workstream. Details about the workstream’s mission, scope, deliverables, and ways to get involved will be added in the near future.

Computational Programming

Computational Programming is a Workstream under the Composable Memory System (CMS) Sub-Project of the OCP Server Project. The CMS Sub-Project grew out of the Future Technologies Initiative’s Software Defined Memory workstream. Details about the workstream’s mission, scope, deliverables, and ways to get involved will be added in the near future.

DC / Memory Fabric Orchestration

DC & Memory Fabric Orchestration is a Workstream under the Composable Memory System (CMS) Sub-Project of the OCP Server Project. The CMS Sub-Project grew out of the Future Technologies Initiative’s Software Defined Memory workstream. Details about the workstream’s mission, scope, deliverables, and ways to get involved will be added in the near future.

Extended Connectivity Requirements

Extended Connectivity Requirements is a Workstream under the Composable Memory System (CMS) Sub-Project of the OCP Server Project. It documents industry usage-model scenarios and requirements for rack-level disaggregated NVMe and/or CXL interconnected compute, acceleration, memory, and storage modules using PCIe Gen5 and Gen6 external Direct Attached (DAC), Active Electrical (AEC), and Active Optical (AOC) cables. The workstream does not explore specific implementation solutions; a future industry standards committee is expected to turn its requirements into a complete standard cabling specification.