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RethinkDB is a document-oriented database similar to MongoDB but aims to overcome scalability and practical limitation of the latter. [1] [2] RethinkDB is built to store JSON documents, and scale to multiple machines with very little effort. It has a pleasant query language that supports really useful queries like table joins and group by, and is easy to setup and learn.

Installing MongoDB

Install rethinkdb from AUR.

# yaourt -S rethinkdb

Now you can start rethinkdb from command-line:

# rethinkdb

Or instead you can run it as systemd service. Enable default rethinkdb instance as

# systemctl enable rethinkdb@default

and start it:

# systemctl start rethinkdb@default

Admin UI will be available at 8080 port.

Configuring Mongodb

RethinkDB has multi-instance support, which means you can run several independent database instances at the same machine. 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> is the name of you configuration that you'll going to use later. Change configuration options in the new config file. Then start the service:

# systectl enable rethinkdb@<NAME>
# systectl start rethinkdb@<NAME>

'default' instance is created at installation time for your convinence. Its data is stored in /var/lib/erethinkdb/default