fastglobal
memento
Our great sponsors
fastglobal | memento | |
---|---|---|
2 | - | |
1,126 | 710 | |
0.0% | - | |
0.0 | 0.0 | |
about 1 year ago | about 2 years ago | |
Elixir | Elixir | |
MIT License | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
fastglobal
-
Show HN: I rewrote the 1990's LambdaMOO server from scratch
> State has to be owned by a process - who owns the state of the world? ... Keep in mind, when data is passed "between" processes it is deep copied.
The Erlang runtime has other stateful things besides processes, and manipulating data within these and/or getting a handle on data in these places doesn't necessarily involve copying.
• ETS tables, which hold state privately to themselves (with copying in/out) in a similar way to how processes do. If you manipulate data inside ETS tables by "sending compute to data" (think Redis INCR) rather than by "sending data to compute", then no copying happens.
• "Globals" in the form of data compiled into read-only versioned modules loaded into the modules table and available to be referenced from any/all active processes, only copied if the module gets unloaded before the process dies. (Originally this was just a design pattern — https://github.com/discord/fastglobal — but it eventually became its own runtime feature in Erlang 22, https://www.erlang.org/doc/man/persistent_term).
• Large binaries (anything over 64 bytes) aren't allocated in an actor's memory arena, but instead are allocated in a special global-per-node binaries heap, and then ref-counted, where each actor-process holds one reference to each large-binary it's using, and then each read-only slice of that binary, in turn holds a reference to the per-actor reference handle for the binary. One clever technique for sharing a large "database" of data between many actors, is to store the data encoded in a large binary in an encoding that is efficient to partwise-decode; and have the "lookup" operation just parse+decode the appropriate data out of the binary. (This is how erlang:module_info/2 used to work — the global modules-table itself holding a set of references to the loaded modules' binaries, which module_info would then parse metadata out of on demand.)
- Issue
memento
We haven't tracked posts mentioning memento yet.
Tracking mentions began in Dec 2020.
What are some alternatives?
wireguardex - Configure WireGuard® interfaces in Elixir using Rust NIFs.
amnesia - Mnesia wrapper for Elixir.
mudmixer - MUDMixer is an add-on for MUD clients that enriches the gaming experience with connection mixing functionality and a variety of other features.
ecto_mnesia - Ecto adapter for Mnesia Erlang term database.
nmoo - An enhanced LambdaMOO-like MOO
pillar - Elixir library client for work with ClickHouse
mica
ecto - A toolkit for data mapping and language integrated query.
tinyfugue - TinyFugue - Rebirth
arc_ecto - An integration with Arc and Ecto.
EtaMOO - A new implementation of the LambdaMOO server
hstore - Hstore support for Postgrex