ityonemo
Spinning this off in a new thread because I think it’s interesting and merits its own discussion. Agree with @hauleth that the basis should be spinning up a c-node inside of julia, but it’s going to need a bit more than that. A few questions:
- How to manage Julia versions to run on
- Julia has a --worker node setting, should we use that?
- How do you load up the correct dependencies? Also, julia annoyingly uses global dependencies, more like python than elixir, which has project-level dependencies.
- Is there something really high performance that one could do like memmapping memory segments and passing data across that way? How do you detect if that capability exists? (windows? Linux? MacOS? etc)
Separately, would anybody be interested in doing a collab on this for SpawnFest 2020?
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hcs42
We use Erlang+Julia in production.
We use Julia’s package compiler to create shared object files that contain the compiled version of our Julia code, its dependencies, and the Julia runtime itself. Then in Erlang we start a new operating system process (erlang:open_port/2) and run our Julia code. Our Julia code is listening for requests on its standard input and sends the responses to its standard output. (This part was inspired by https://github.com/hdima/erlport.) We plan to modify our code to use sockets instead of standard IO.
ityonemo
OK, I’m slightly biased because I came to Elixir directly from Julia because I didn’t think Julia had a “deploying real user-facing things” story despite being 1.0… maybe I’m the only one, ha.
Julia matches extremely well with the academic mindset and the mindset of machine learning professionals (even though some of them don’t know it yet), which is why it’s in the beginning stages of blowing up in that field. It also meshes really well with elixir in terms of its programming paradigms (functional, escape hatches for statefulness, capitalized modules, secretly a lisp). I think stronger julia ↔ elixir interop is a thing that could be really amazing, and is currently an unsolved problem. I also know that there have been lots of rumblings in the elixir community about wanting this…
dokie
Joining this discussion late on but wanted to say that we are using both Elixir and Julia in production in a kubernetes cluster communicating back and forth over HTTP api’s. By adopting a functional approach in Julia with no state management we are able to have acceptable performance.
Last Post!
Changxin
Oh, Thanks!
I’ve been working on a reasoning system using
Elixir/OTP(I’m really enjoy it !!!). The system should have been connected to the robot hardware, but for testing purposes a simulated environmentWebotswas chosen.Unfortunately, webots doesn‘t have a language interface for Elixir. So, I use
Juliacall itsdlland transfer robot status toElixirbySocket.Well, the status information also includes camera images, so
msgpackmay be a good choice, just like whatAirSimdoes. But the images are represented byStringand its resolution is relative small, soJSONis used by the system.I want a good interoperability between
JuliaandElixir, both are great programming languages! However, now,Socket+JSONorMsgPackmay be more realistic.