https://github.com/liveforeverx/ratx

Rate limiter and overload protection for erlang application
https://github.com/liveforeverx/ratx

Last synced: 2 months ago
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Rate limiter and overload protection for erlang application

• Host: GitHub
• URL: https://github.com/liveforeverx/ratx
• Owner: liveforeverx
• License: other
• Created: 2015-04-25T14:38:13.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2017-10-04T11:41:18.000Z (over 7 years ago)
• Last Synced: 2024-08-09T20:50:37.992Z (5 months ago)
• Language: Erlang
• Homepage:
• Size: 4.88 KB
• Stars: 20
• Watchers: 3
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

Awesome Lists containing this project

• freaking_awesome_elixir - Erlang - Rate limiter and overload protection for erlang application. (Miscellaneous)
• fucking-awesome-elixir - ratx - Rate limiter and overload protection for erlang application. (Miscellaneous)
• awesome-elixir - ratx - Rate limiter and overload protection for erlang application. (Miscellaneous)

README

        
# Ratx

The Ratx Erlang application provides overload protection for

Erlang systems. It provides queueing facilities for tasks to be

executed so their concurrency can be limited on a running

system.

# Inspiration

Ratx owes its inspiration to Ulf Wigers `jobs` framework and

Jesper Louis Andersen `safetyvalve`, but it is a different

implementation and a different approach as well.

The main difference and goal is to try to eliminate the one gen_server

process to handle all requests. And, the same as `safetyvalve` to

have one process per queue, which can be supervised(and restarted,

if something go wrong).

`ets:update_counter/3` seems the best options and natural to try, and

heavily used in production for such use cases with good effort.

Due to this change, the queue process should only handle all `done`-s,

and dropping of entries in a queue after timeout. If queue is full, no

messages or calls will be sent to a queue process, that is a protection

for a process on big birsts.

# Using

Example of using

```erlang

ratx:start_link(test_queue, [{limit, 10}, {queue, 100}, {queue_timeout, 1000}]),

Action = fun(I, Time) -> io:format("~p..", [I]), timer:sleep(Time) end,

[spawn(fun() -> ratx:run(test_queue, fun() -> Action(I, 40) end) end) || I <- lists:seq(1, 30)], ok.

```