One major flaw with the free version of Neo4j
>> “Our summary is, whenever you can use MySQL free, you can use Neo4j community for free,” said Eifrem.
You cannot perform hot backups on a running instance of Neo4j community edition. You must stop the instance, then backup the files, then re-start the instance. For hot backups, you must buy the enterprise edition.
You CAN perform a hot backup on a running instance of the MySQL community edition, using a free, open source tool such as Percona XtraBackup. Free database server, free hot backup tool.
You do backup your databases regularly, right?