WasmSR: WebAssembly runtime with snapshotting and restoring functionality

WebAssembly is a way to safely run code compiled in other languages. Runtimes execute WebAssembly Modules (Wasm), which are most often binaries with a .wasm extension.

This runtime is based on wazero, a WebAssembly Core Specification 1.0 and 2.0 compliant runtime written in Go.

This video presents the FFmpeg experiment. Two Docker containers were set up, and the video transcoding is migrated every 10 seconds between the two containers. The logs for the Docker containers can be seen with the prefix host-1 and host-2.

ffmpeg.mp4

Running Examples

The snapshotting example can be found in examples/snapshot.

Below commands are listed to execute the experiments mentioned in the thesis.

Run the fibonacci example fib(9)

go run snapshot.go -quiet

Print trace of the fibonacci example, instructions only

go run snapshot.go

Print trace of the fibonacci example, instructions + execution state

go run snapshot.go -all

Run the `cat` example (to test the WASI interface)

go run snapshot.go -program cat -quiet

Run the `transcoding` example

go run snapshot.go -program transcoding -quiet

Snapshot server experiment

Use keys 'r' for a request to the server and keys 's' for a snapshot.

First, run the program from an initial state:

go run snapshot.go -program server -quiet -trap -export 
# now press 'r' a few times
# finally press 's', which snapshots the program into snapshot.bin

Then, restore the server from the snapshot.bin file and see that the counter stays the same:

go run snapshot.go -program server -quiet -trap -export -from-snapshot snapshot.bin
# press 'r' a few times and see that the counter is valid.

Ping pong execution between two hosts

# peer 1
go run snapshot.go -program transcoding -mode remote -port 50051 -peer 50052 -quiet -trap -snapshotS 10 -no-indent -send

# peer 2
go run snapshot.go -program transcoding -mode remote -port 50052 -peer 50051 -quiet -trap -snapshotS 10 -no-indent

mmathys/wasmsr