what is the nature of the data? using postgres with https://github.com/timescale/timescaledb or https://github.com/citusdata/citus comes to mind… admittingly I would think “normal” postgres is also up for the job…
that being said I would cautiously warn against changing both the DB and the App layer(to elixir I assume) at the same time… but all depends on complexity etc. etc.
I would try and get something going using the old DB and Elixir (perhaps reverse proxy the Java app and then build out slowly… Migrating from Rails to Elixir, bit by bit)
