HeavyRain266

I slowly work on the public release of Submerge VCS, and SQLite driver for my factory simulation game (in Odin) with online trading system (in Erlang).

All the people from Elixir community I met, kept telling me "Mnesia sucks, use Postgres instead" through Ecto DSL of course. Same goes about pushing towards Redis and gRPC. Most of them will try to convince you to start using Phoenix instead... Also there are very little to no references on how to use e.g. Cowboy or Bandit without Plug DSL.

Before you ask, we're not going to ever fully adopt Elixir (or Gleam) as its ecosystem is built around Phoenix framework and external services/databases. We would have to maintain internal bindings/implementations of things that are unmaintained on Elixir's side. Also worth to mention that it has a large amount of syntax sugar and its users have that weird fetish for abstracting stuff into DSL interfaces.

Erlang, OTP, and the BEAM offer much more than just behaviours. The VM is similar to a virtual kernel with supervisor, isolated processes, and distributed mode that treats multiple (physical or virtual) machines as a single pool of resources. OTP provides numerous useful modes, such as Mnesia (database) and atomic counters/ETS tables (for caching), among others. The runtime also supports bytecode hot-reloading, a feature used to apply patches without any system downtime. While the syntax is not very screen reader-friendly, it is digestable.

Apache Mesos[1] is the only thing that comes to my mind as a similar platform to BEAM in its ability to treat multi-machine resources as a single pool.

Over a year ago, my private consulting company decided to adopt Erlang as our backend language. After some time, we started exploring BEAM's internals to, for example, replace the TCP-based stack with QUIC and integrate some Rust patches. A truly fantastic choice for lightweight and high-throughput systems that are only failing in case of kernel panic or power loss. We are currently working on very "busy", concurrent software like a film/game production tracker and pipeline manager, and are now also preparing R&D for a private hospital management services.

[1]: https://mesos.apache.org/

Heh, I’d love to, but we’re small Scandinavian business with not enough revenue to cover salary of such person yet (2-3m isk/mo).

We're not hiring at the moment.

Yes, commercial production servers. Similar to some other systems and certain consoles, microkernel is used as hypervisor that protect bare metal hardware from potential hazards when guest monoliths like mentioned FreeBSD becomes compromised. Guest components are running our software and services inside jails on two 128 core, two 64 core and one 32 core Ampere processors where first two machines run heavy workloads like offline rendering and Erlang VM clusters, while others are used to provide a few VPS servers, and internal services.

I’m a fan of microkernel hosts for guest monoliths, thus our servers are running seL4 as safety layer and backups for FreeBSD VMs with jails for renderfarm, BEAM clusters and Jenkins.

All I’m missing is an ARM port of DragonflyBSD for its threading and in-process kernels (hybrid kernel design). My dream is to run it on 128 cores Ampere Altra to run OpenMoonRay more effectively.