Neo4j DB upgrade from 3.5.26 to 4.4.4

Prerequisites

• Install OpenJDK 11 or Oracle Java 11.

Migration Steps:

• Shutdown Neo4j if it is running.

• Back up neo4j.conf and “data/databases” folder either using the online backup tool or offline backups and store in safe location.

• Download operating system specific Neo4j 4.4.4 installation zip or tar from below links:

  • For Windows: https://dist.neo4j.org/neo4j-community-4.4.4-windows.zip

  • For Linux: https://dist.neo4j.org/neo4j-community-4.4.4-unix.tar.gz

• To get the Neo4j custom setting steps refer Neo4j Installation .

• Untar or unzip Neo4j 4.4.4 folder and Neo4j setting zip.

• Copy the data directory from old installation to new one.

  (NOTE: The migration of users and roles from 3.5.26 to 4.4.4 is done automatically. Therefore, you do not have to move the “data/dbms/” directory and contents to the new installation.)

• Change database name “graph.db” to default “neo4j” or any valid database name. (For database naming rules refer - https://neo4j.com/docs/operations-manual/current/manage-databases/configuration/#:~:text=Naming%20rules%20for%20databases%20are%20as%20follows%3A )

• In neo4j.conf, set dbms.allow_upgrade=true to allow automatic store upgrade and uncomment dbms.default_database=neo4j (update database name here if it’s not “neo4j”)

• Start Neo4j 4.4.4. The database migration will take place during start-up.

Post migration steps:

• When the upgrade has finished, dbms.allow_upgrade should be set to false or be removed.

• Restart the database.

• Update Neo4j version and database name in server-config.json inside "graph" section.

• If you have changed Neo4j credentials then update "authToken" as well in server-config.json.