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How can I run multiple Neo4j databases simultaneously on a single server? I would like to have separate data directories and ports if this is possible.
Has anyone done this successfully and if so explain how to do this
I have tried something like:
bin\neo4j start
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Neo4j offers the ability to work with multiple databases within the same DBMS. For Community Edition, this is limited to one user database, plus the system database. From a driver API perspective, sessions have a DBMS scope, and the default database for a session can be selected on session construction.
A default installation of Neo4j 4.4 contains two databases: system - the system database, containing metadata on the DBMS and security configuration. neo4j - the default database, a single database for user data.
A thread can handle numerous connections. The bolt thread pool size only limits how many bolt threads, neo4j server can concurrently handle. If a connection is inactive, then no thread is assigned to that connection. Currently there is no limit for idle connections on server.
To set up Neo4j with multiple instances on a single server, you essentially configure a cluster, with each node having its own set of configuration properties. You then run the cluster in single-instance (non-HA) mode (otherwise you'll just end up with a replication cluster, which doesn't meet your requirement).
Full instructions are in the Neo4j docs online and in your local doc\manual folder.
Note: The folks at Neo Technology call this out for dev/test purposes. I can't offer guidance on running this in production, other than the fact you'd have multiple instances competing for the same resources (cpu, disk, memory, network).
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