DBSP performs computations using a collection of worker threads that all implement the same circuit. Worker threads interact only by exchanging data at key points in the computation. Distributed DBSP extends this model by allowing exchange to occur across a network rather than only through data structures within a single process.

This directory contains two programs that jointly demonstrate the concept. The first program, called pool, implements the same circuit as the tutorial9 example. When it starts, it listens for RPC connections on a TCP port specified on the command line.

The second program, called coord, accepts a list of pool addresses to connect to, as well as a second list of addresses the pool instances can use to exchange data among themselves. It feeds data to each pool in turn, steps the circuit, and prints the output.

For a demo with two "host"s, run each of these in turn in a separate terminal. If it works, the coord process will print the same output that tutorial9 would:

cargo run --example pool -- --address 127.0.0.1:1234
cargo run --example pool -- --address 127.0.0.1:1235
cargo run --example coord -- --pool 127.0.0.1:1234 --pool 127.0.0.1:1235 --exchange 127.0.0.1:1236 --exchange 127.0.0.1:1237