What does RDMA let a server do?
Why B is the answer
Move data to another server's memory with little CPU work
Remote direct memory access bypasses most of the CPU and operating system path.
In detail
- RDMA moves data to another server's memory with little CPU work.
- This lowers latency.
Use case
An illustrative scenario, not a real incident.
A node writes data straight into another node's memory, and uses little CPU time.
See it in different ways
flowchart TD
A{"What are the priorities?"} -->|"Largest training, lowest latency"| B["InfiniBand"]
A -->|"Ethernet skills and RDMA"| C["RoCE on Ethernet"]
A -->|"AI on Ethernet at scale"| D["Spectrum-X"]sequenceDiagram participant A as Server A memory participant N as NIC participant B as Server B memory A->>N: Direct read N->>B: Direct write over the fabric B-->>A: Completion
sequenceDiagram participant P0 as Server A memory participant P1 as Network card participant P2 as Server B memory P0->>P1: Direct transfer P1->>P2: Direct placement
Key point: RDMA moves data with little CPU work.
Why the other options are wrong
- A. Assign IP addresses to each new device on a network
- That is DHCP.
- C. Encrypt all of the data on the server's local disks
- That is disk encryption.
- D. Split one GPU into several hardware partitions
- That is MIG.