More Backends

[JuneKelly]

We should have more backends, because this project aims to be maximally useful in a variety of architectures. Perhaps:

• Mnesia
• Postgres (or a generic SQL backend? Probably Ecto)
• MongoDB
• ???

[sobolevn]

I can help with ecto backend.
Could you please create a repo for me?

[JuneKelly]

@sobolevn, done (https://github.com/ExHammer/hammer-backend-ecto) and thanks :)

[JuneKelly]

Just a brain-wave, a Riak backend would also be cool.

[lpil]

One that uses distributed Erlang with no external dependency would be useful :)

[sobolevn]

There is ets backend. https://github.com/ExHammer/hammer/blob/master/lib/hammer/backend/ets.ex

[lpil]

But it's hard coded to be registered locally rather than globally, so it cannot be used in this way in a straightforward manner.

[JuneKelly]

Good point, I’ll look into making it distribu-able this week

[lpil]

Thank you

[JuneKelly]

I'm also wondering if maybe an Mnesia backend would be appropriate for the same use-case. Will investigate also.

[lpil]

Mnesia has some flaws, such as struggling with network partitions. What would we gain by using Mnesia over plain old ETS?

[JuneKelly]

Update: I've had a hard time finding energy and time to work on this, but it's still very much on my radar. Will try to get distributable-ets done over the december holidays. Pull-requests always welcome of course, but I'm hoping to get some traction on this soon. :)

[lpil]

Cool, thank you :)

We're using Redis in production at the moment and it's working really well so please don't feel any urgency from us

[JuneKelly]

@lpil , that's great to hear :) I'm glad it's working well in production.

[JuneKelly]

Mnesia backend started here: https://github.com/ExHammer/hammer-backend-mnesia

[jared-mackey]

Any interest in a Nebulex adapter?

[epinault]

@jared-mackey seems like an interesting idea. what backend are currently supported with Nebulex?

[florius0]

It would be nice to have atomics backend (like https://github.com/farhadi/rate_limiter does it) with crdt distribution.

[epinault]

@florius0 see #72 . Seems. @ruslandoga was looking at that but not sure if he made any progress on cutting his MR smaller