Does RethinkDB not offer 32 bit versions?
RethinkDB's download page has download links to various *nix packages, but all of them pertain to 64 bit architectures.
Is there a 32 bit version or is it simply not supported?
Edit: We've just added 32-bit support in RethinkDB 1.3, see how to install it at rethinkdb.com/docs/install.
Original answer:
RethinkDB is currently only available for 64-bit architectures. We may offer 32-bit support in future versions of RethinkDB.
I'll be sure to pass a note along to make the download page clearer about prerequisites.