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> Edit: It’s yet another meta protocol built on top of TCP/UDP. What are you basing that on? Nothing in the article implies that as far as I can see.
by jsnell 3y ago
> Edit: It’s yet another meta protocol built on top of TCP/UDP.
What are you basing that on? Nothing in the article implies that as far as I can see.
- johncolanduoni 3y agoThe diagram in the article shows it layered over UDP.
- ianburrell 3y agoThe diagram shows it layered on top of RDMA and NVM Express, and supporting UDP and IP. Unless you think the reverse makes sense. The diagram is just upside down.
- wmf 3y agoIt's not upside down. RDMA and NVMe run on top of Falcon which runs on top of UDP.
- ianburrell 3y agoRDMA is a low-level physical transport. You are saying that they are going to emulate RDMA on top of Falcon. Are they going to run Ethernet and then IP on top of that? The diagram is confusing since it upside down to layering direction, but the article is clear. Falcon is a hardware transport protocol, replacing Ethernet. Like Ethernet, it runs on top of physical transport like RDMA. And IP runs on top of Falcon and Ethernet.
- wmf 3y agoRDMA is a low-level physical transport. It's not. For example, RDMA can run on top of TCP (iWarp). NVMe can also run on TCP. Now replace TCP with Falcon.
- stonogo 3y agoRDMA stands for Remote Direct Memory Access. The version that runs on ethernet is known as RDMA over Converged Ethernet, or RoCE. Until recently, the most common hardware interconnect used to support RDMA was Infiniband. Omnipath existed for a while. The point is: RDMA is just a term for a computer reading memory on another computer without involving the operating system. The interconnect hardware and physical transport must support RDMA but that doesn't mean it is RDMA, as there are several different implementations of RDMA, and each kind of hardware supports a different subset of those implementations.