RightSpeed is an experimental application server to host Rack applications, on Ractor workers, to test/verify that your application is Ractor-safe/Ractor-ready or not. Ractor is an experimental feature of Ruby 3.0, thus this application server is also not for production environments.
Currently, RightSpeed supports the very limited set of Rack protocol specifications. Unsupported features are, for example:
- Writing logs into files
- Daemonizing processes
- Reloading applications without downtime
- Handling session objects (using
rack.session
) - Handling multipart contents flexisbly (using
rack.multipart.buffer_size
norrack.multipart.tempfile_factory
) - Hijacking
It can be. In our opinion, it may not be a tremendous difference, but could be a little improvement because:
- Accepted connection delivery inter-Ractor should be faster than bringing those over IPC
- JIT compilation can be just once using multiple Ractor
- ... and?
- v0.2.0:
- Add worker-type "fair" and "accept" in addition to "roundrobin"
- v0.1.0:
- The first release just before RubyKaigi Takeout 2021
Use the latest Ruby 3.x release!
Install right_speed
by gem
command (gem i right_speed
), then use it directly:
$ right_speed -c config.ru -p 8080 --workers 8
$ right_speed --help
Usage: right_speed [options]
OPTIONS
--config, -c PATH The path of the rackup configuration file (default: config.ru)
--port, -p PORT The port number to listen (default: 8080)
--backlog NUM The number of backlog
--workers NUM The number of Ractors (default: CPU cores)
--worker-type TYPE The type of workers (available: roundrobin/fair/accept, default: roundrobin)
--help Show this message
Or, use rackup
with -s right_speed
:
$ rackup config.ru -s right_speed -p 8080 -O Workers=8
The default number of worker Ractors is the number of CPU cores.
The --worker-type
option is to try some patterns of use of Ractors.
roundrobin
- Listener Ractor will accept connections, then send those to Worker Ractors in round-robin
- Worker Ractors will consume their input connections one-by-one
fair
- Listener Ractor will accept connections, and yield those to consumers (workers)
- Worker Ractors will take connections from Listener as soon as they become available
accept
- Listener does nothing
- Worker Ractors will accept connections, process requests individually
Currently, any of above workers cannot work well. We observed SEGV or Ruby runtime busy after traffic in seconds.
Bug reports and pull requests are welcome on GitHub at https://github.com/tagomoris/right_speed.
The gem is available as open source under the terms of the MIT License.