+ We make a case for remote direct code execution (RDX)—a vision that elevates the power of RDMA from memory access to code execution. Concretely, we target runtime extension frameworks such as Wasm filters, BPF programs, and UDF functions, where RDX enables an agent-less architecture that unlocks capabilities such as fast extension injection, update consistency guarantees, and minimal resource contentions. We envision a technical roadmap for RDX around a new CodeFlow abstraction, encompassing programming remote extensions, exposing management stubs, remotely validating and JIT compiling code, seamlessly linking code to local context, managing remote extension state, and synchronizing code to targets. The case studies and initial results demonstrate the end-to-end feasibility of RDX, and its potential to spark the next wave of RDMA innovations.
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