The main requirement to support this is that a RoCE or other RDMA API needs to be exposed inside the cloud VM. This requires (1) the physical boxes have RDMA (likely universal at this point), but also (2) the virtualized network adapter, e.g. AWS ENA, to expose an RDMA API, which is much harder.
AWS did not support any kind of RDMA when I looked into it last year. Azure does, but in my understanding this is only in their "supercomputer partition," which is not really a cloud environment.
I've heard that AWS is looking to write an ENA backend for GASNet (a communication library), which could perhaps (?!) lead to them exposing RDMA and other low-level NIC features.
The main requirement to support this is that a RoCE or other RDMA API needs to be exposed inside the cloud VM. This requires (1) the physical boxes have RDMA (likely universal at this point), but also (2) the virtualized network adapter, e.g. AWS ENA, to expose an RDMA API, which is much harder.
AWS did not support any kind of RDMA when I looked into it last year. Azure does, but in my understanding this is only in their "supercomputer partition," which is not really a cloud environment.
I've heard that AWS is looking to write an ENA backend for GASNet (a communication library), which could perhaps (?!) lead to them exposing RDMA and other low-level NIC features.