ra
Riak
| ra | Riak | |
|---|---|---|
| 7 | 1 | |
| 778 | 3,903 | |
| 0.5% | 0.3% | |
| 8.9 | 1.9 | |
| 5 days ago | 2 days ago | |
| Erlang | Shell | |
| GNU General Public License v3.0 or later | Apache License 2.0 |
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.
ra
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The Erlang Runtime System
Erlang/OTP doesn't handle leader election, and by itself is bad at handling netsplits.
There is https://github.com/rabbitmq/ra which is a Raft implementation in Erlang that is Jepsen-tested. You could use it to build "etcd in Erlang", or https://github.com/rabbitmq/khepri which is built on top of Ra.
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Ask HN: Good examples of fault-tolerant Erlang code?
Just to add to this, there are some implementations of things like consensus algorithms in Erlang such as Ra: https://github.com/rabbitmq/ra
- Elixir at Ramp
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An Animated Introduction to Elixir
You may find these interesting...
- "The Onion Layer Theory" https://learnyousomeerlang.com/building-applications-with-ot...
- "On Erlang, State and Crashes" http://jlouisramblings.blogspot.com/2010/11/on-erlang-state-...
- "Why Restarting Works" https://ferd.ca/the-zen-of-erlang.html (search for "Heisenbug")
> you should store the state in the external system
Disk works too, but if you're multi-node this means you now have a distributed database embedded in your system, which may or may not be your goal :)
RabbitMQ does this, they developed a library for "persistent, fault-tolerant and replicated state machines" based on Raft: https://github.com/rabbitmq/ra.
- Question about a Decentralized Timeline
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Building Aggregates in Elixir and PostgreSQL
Here is link number 1 - Previous text "Ra"
Riak
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Ask HN: Good examples of fault-tolerant Erlang code?
Step zero is definitely the OTP Design Principles doc (part of the OTP distribution):
https://www.erlang.org/doc/design_principles/users_guide
There are some good texts that have more examples:
Erlang & OTP in Action - https://www.manning.com/books/erlang-and-otp-in-action
Designing for Scalability with Erlang/OTP - https://www.oreilly.com/library/view/designing-for-scalabili...
One big example of distributed Erlang is Riak:
https://github.com/basho/riak
What are some alternatives?
lasp - Prototype implementation of Lasp in Erlang.
CouchDB - Seamless multi-master syncing database with an intuitive HTTP/JSON API, designed for reliability
MicroRaft - Feature-complete implementation of the Raft consensus algorithm in Java
Redis - Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, Streams, HyperLogLogs, Bitmaps.
khepri - Khepri is a tree-like replicated on-disk database library for Erlang and Elixir.
MongoDB - The MongoDB Database
asdf - Extendable version manager with support for Ruby, Node.js, Elixir, Erlang & more
Apache HBase - Apache HBase
Atomix - A Kubernetes toolkit for building distributed applications using cloud native principles
RethinkDB - The open-source database for the realtime web.
buffstreams - A library to simplify writing applications using TCP sockets to stream protobuff messages
LevelDB - LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.