RethinkDB is a document-oriented database similar to MongoDB but aims to overcome scalability and practical limitation of the latter.   RethinkDB is built to store JSON documents, and scale to multiple machines with very little effort. It has a pleasant query language that supports queries such as table joins and group by. It is easy to setup and learn. For more detailed information, see the official homepage.
Install from the official repositories.
Create and set user rights for RethinkDB folder:
# mkdir /var/lib/rethinkdb/default # chown -R rethinkdb:rethinkdb /var/lib/rethinkdb/
Now you can start `rethinkdb` from the command-line:
Or instead you can run it as a `systemd` service. Enable the default `rethinkdb` instance as
# systemctl enable rethinkdb@default
and start it:
# systemctl start rethinkdb@default
RethinkDB's admin UI is now available on port 8080.
RethinkDB has multi-instance support, which means you can run several independent database instances on the same machine. The `systemd` service also supports multi-instance configuration.
To create a new RethinkDB instance, create its configuration file:
# cd /etc/rethinkdb # cp default.conf.sample instances.d/<NAME>.conf
where <NAME> represents the configuration you'll be using later. Change the configuration options in the new config file. Then start the service:
# systemctl enable rethinkdb@<NAME> # systemctl start rethinkdb@<NAME>
The 'default' instance is created at installation time for your convenience. Its data is stored in `/var/lib/rethinkdb/default`.