Faasm is a high-performance stateful serverless runtime.
Faasm provides multi-tenant isolation, yet allows functions to share regions of memory. These shared memory regions give low-latency concurrent access to data, and are synchronised globally to support large-scale parallelism.
Faasm combines software fault isolation from WebAssembly with standard Linux tooling, to provide security and resource isolation at low cost. Faasm runs functions side-by-side as threads of a single runtime process, with low overheads and fast boot times.
Faasm is built on Faabric which provides the distributed messaging and state layer.
Faasm defines a custom host interface which extends WASI to include function inputs and outputs, chaining functions, managing state, accessing the distributed filesystem, dynamic linking, pthreads, OpenMP and MPI.
Our paper from Usenix ATC '20 on Faasm can be found here.
git submodule update
Start a Faasm cluster locally using
docker-compose up -d --scale worker=2 nginx
To compile, upload and invoke a C++ function using this local cluster you can use the faasm/cpp container:
docker-compose run cpp /bin/bash # Compile the demo function inv func demo hello # Upload the demo "hello" function inv func.upload demo hello # Invoke the function inv func.invoke --host=nginx demo hello
More detail on some key features and implementations can be found below: