Dgraph database requirements

The Dgraph stores the data sets it queries in a set of databases. For high availability, these can be stored on HDFS/MapR-FS or a shared NFS. They can also be stored on the local disk for a non-HA option.

The location you choose determines the database requirements, as well as where the Dgraph will be installed and its behavior. For more information, see:
Note: You can install with pre-existing BDD-formatted databases if you have any you want to use. To do this, put them in the directory you want to store your databases in and point BDD's configuration file to it. For more information, see Configuring BDD.

Regardless of where you put your Dgraph databases, you must increase the allowed numbers of open file descriptors and processes on all nodes in the cluster, including Hadoop nodes. For more information, see Increasing the numbers of open file descriptors and processes.