SIGCOMM 2020: 1RMA: Re-envisioning Remote Memory Access for Multi-Tenant Datacenters

Explore a conference talk that delves into 1RMA, a novel approach to remote memory access in multi-tenant datacenters. Learn about the challenges faced by RDMA in modern datacenter applications and discover how 1RMA addresses these issues through innovative solutions. Examine key ideas such as connection-free independent operations, explicitly-finite NIC resource pools, and solicitation. Gain insights into the judicious division of labor between hardware and software, leading to a simplified and fixed-function 1RMA NIC. Understand the importance of first-class support for security operations and the role of local congestion reaction in this reimagined remote memory access system.

1RMA: Re-envisioning Remote Memory Access for Multi-tenant Datacenters
Problem Statement RDMA is an attractive option for modern datacenter applications due to its low latency and high throughput benefits
Pathologies due to Connections Address connection scalability and performance issues via connection sharing - Multiplexing independent workloads on the same connection
Connection-centric Security
Rigid Congestion Control and Loss Recovery
RDMA Challenges: Root Causes
1RMA Approach Judicious division of labor between hardware and software leading to a simple and fixed-function 1RMA NIC aided by 1RMA software
1RMA Key Idea #1: Connection-Free Independent Ops 1RMA NIC acts on fixed-sized ops and treats them independently
1RMA Key Idea #2: Explicitly-Finite NIC Resource Pools
1RMA Key Idea #3: Solicitation
1RMA Key Idea #5: First-class Support for Security Ops 1RMA offers a Rekey op that provides support for encryption key rotation
What role does local congestion reaction play?
Summary