Good morrow friends, I’ve been looking for an Elixir equivalent to Golang’s BoltDB . Does one exist?

Check out ETS, here’s the elixir school page Erlang Term Storage (ETS) · Elixir School

Technically speaking ets isn’t equivalent to BoltDB since ets is not persistent. For that you’d have to look at dets or mnesia. If you’re just looking for LMDB then there’s a good nif for it here: GitHub - zambal/elmdb: Erlang NIF driver for LMDB, a fast, compact and transactional key-value data sto…

[image] keathley: If you’re just looking for LMDB then there’s a good nif for it here: https://github.com/zambal/elmdb . While GitHub - LMDB/lmdb: Read-only mirror of official repo on openldap.org. Issues and pull requests here are ignored. Use OpenLDAP ITS for issues. · GitHub seems to be al…

[image] Exadra37: Any real world example of projects in Elixir/Erlang using LMDB in production? I don’t know of any. I also don’t know that I’d argue that the nif is dead but you’ll have to make that judgement for yourself. As far as other KV stores go I’ve used rocksdb | Hex a ton and really…

I am just exploring my way into Elixir world and a lot curious about everything not really on the need of anything in special for now. Why not Mnesia instead of other KV stores? PS: nice podcasts :slight_smile:

Thanks for the links. Are there any performance benefits to having a native Elixir implementation vs an NIF? Similar to what Golang has with BoltDB?

[image] Exadra37: Why not Mnesia instead of other KV stores? Preference I guess. Mnesia provides more features then either rocksdb or lmdb but also has some issues with file loading times, maximum file sizes, repair times on corrupted files, etc. IIRC Klarna built a backend for mnesia in leve…

We do need persistence. I should of been more specific with the topic title. RocksDB and it’s predecessor LevelDB are fine for smaller database applications but as the database grows into the double digit GB range and above, the performance degradation tends to be quite noticeable.

Well DETS (which is what mnesia is based on) has a max 2gb file size so you’ll have to use mnesia’s table fragmentation anyway in that case. [image] envertech: RocksDB and it’s predecessor LevelDB are fine for smaller database applications but as the database grows into the double digit GB rang…

For local KV storage I tend to use either DETS (single-load use), mnesia (persistant save/load use), or leveldb (for high speed data that might exceed 2 gigs). Overall I default to mnesia.

Elixir Programming Language Forum

Is there a pure Elixir KV Store?

Questions & Help Questions

AndyL March 18, 2025, 8:08pm 15

I’ve used CubDB and like it.