[tombert]

I more or less built my own database in Erlang a few months ago. I say "more or less" because I did use Bitcask as the underlying store, and I used the riak_core libraries initially, but I did handle replication and different fault tolerance techniques on my own.

It was actually very fun; a key-value database is something that can be any level of difficulty that you want. If you want a simple KV "database", you could just serialize and deserialize a JSON string all the time, or write a protobuf, but there is of course no limit to the level of complexity.

I use the JSON example because that was actually how I started; I was constantly serializing and deserializing JSON with base64 binary encoded strings, just because it was easy and good enough, and over the course of building the project I ended up making a proper replicated database. I even had a very basic "query language" to handle some basic searches.

[marci]

Any repo? even if not production ready. I'm curious about how you approached replication, compared to mnesia or couchdb, especially now that erlang natively supports json.

[tombert]

Sadly it’s in a private repo as I had ambitions of trying to sell the product, which I haven’t completely given up on yet.

That said, a lot of the concepts come from riak_core, which is FOSS: https://github.com/OpenRiak/riak_core