Neo4j can be embedded into your application, run as a standalone server or deployed on several machines to provide high availability.
Table 1.1. Neo4j deployment options
| Single Instance | Multiple Instances | |
|---|---|---|
Embedded | EmbeddedGraphDatabase | HighlyAvailableGraphDatabase |
Standalone | Neo4j Server | not yet available |
Neo4j is normally accessed as a standalone server, either directly through a REST interface or through a language-specific driver.
Neo4j can be embedded directly in a server application by including the appropriate Java libraries.
When programming, you can refer to the GraphDatabaseService API.
To switch from a single instance to multiple highly available instances, simply switch from the concrete EmbeddedGraphDatabase to the HighlyAvailableGraphDatabase.
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