Grpc

MSA is a decision about which criterion to use to decompose the system. Domain boundary, data ownership, scale pattern, failure isolation — the chosen criterion creates the service boundaries, and those boundaries decide communication and data in turn.

HTTP/1.1 processes requests and responses sequentially. HTTP/2 changed this with multiplexing, binary framing, and header compression. A summary of the differences between the two protocols and gRPC, which runs on top of HTTP/2.