[erlang-questions] If you make WhatsApp today...

Richard Carlsson <>
Mon Oct 12 11:13:12 CEST 2015


On Mon, Oct 12, 2015 at 8:03 AM, Ulf Wiger <> wrote:

> * They stopped playing around and are now using ‘mnesia_ext’ with a
> leveldb backend
>

Correct, we have been using leveldb as a backend for mnesia for some time
now, and it works very well. The space savings (both on disk and in memory)
are enormous.

As I understand it, Klarna will publish the leveldb backend (the pgsql
> backend was an experiment, so I don’t know about that).
>

We intended to do this sooner, but as usual, we've been kept busy with more
pressing things. There is one major performance-improving change that we
want to do before we push this out, so that people don't start relying on
the old behaviour. Hope to have this done soonish.

    /Richard
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