Run a Transactor

For this tutorial, you will run a dev mode transactor on your local machine. Dev storage will persist your data by using local disk files for storage. It requires a transactor to be running.

To start a transactor, you need a transactor properties file. Datomic includes example properties files for each storage. Copy the config/samples/dev-transactor-template.properties file to a location of your choice, so that you can edit it later if needed.

This guide will use the config directory in your datomic-pro distribution directory:

cp config/samples/dev-transactor-template.properties config/dev-transactor-template.properties

From your shell system, run:

bin/transactor config/dev-transactor-template.properties

=>
Launching with Java options -server -Xms1g -Xmx1g -XX:+UseG1GC -XX:MaxGCPauseMillis=50
System started 

Next, you will use this database URI to connect to a database. The transactor process will be used for the subsequent steps in this guide. Make sure that it's running while you work through this guide.