Neo4j Memory Server

# Neo4j Setup with DozerDB DozerDB enhances Neo4j Community Edition with additional features like multi-database support. This guide shows you how to get it running with the Graph Data Science (GDS) plugin for vector similarity operations. ## Quick Start Follow the installation instructions at https://dozerdb.org/ for the latest setup procedures. Example DozerDB setup: ```bash docker run \ -p 7474:7474 -p 7687:7687 \ -v $HOME/neo4j/data:/data \ -v $HOME/neo4j/logs:/logs \ -v $HOME/neo4j/plugins:/plugins \ --env NEO4J_AUTH=neo4j/password \ --env NEO4J_dbms_security_procedures_unrestricted='gds.*' \ graphstack/dozerdb:latest ``` ## Install Graph Data Science Plugin Refer to https://dozerdb.org/ for current GDS plugin installation instructions, as download links and versions change frequently. ## Access Neo4j Browser Open http://localhost:7474 in your browser. - **Username**: `neo4j` - **Password**: `password` (change this!) ## Configuration for Memory App Create a `.env` file: ```env NEO4J_URI=bolt://localhost:7687 NEO4J_USER=neo4j NEO4J_PASSWORD=password NEO4J_DATABASE=neo4j ``` ## Verify Installation Test that everything works: ```cypher // Test similarity function RETURN gds.similarity.cosine([1,2,3], [2,3,4]) as similarity ``` ## Docker Compose Alternative If you prefer compose, create `docker-compose.yml`: ```yaml version: '3.8' services: neo4j: image: graphstack/dozerdb:latest ports: - "7474:7474" - "7687:7687" environment: - NEO4J_AUTH=neo4j/password - NEO4J_dbms_security_procedures_unrestricted=gds.* volumes: - neo4j_data:/data - neo4j_logs:/logs - neo4j_plugins:/plugins restart: unless-stopped volumes: neo4j_data: neo4j_logs: neo4j_plugins: ``` ## Available Vector Functions Once installed, these similarity functions are available: - `gds.similarity.cosine(vector1, vector2)` - Cosine similarity - `gds.similarity.euclidean(vector1, vector2)` - Euclidean similarity - `gds.similarity.euclideanDistance(vector1, vector2)` - Euclidean distance - `gds.similarity.pearson(vector1, vector2)` - Pearson similarity ## Troubleshooting **Container won't start**: Check if ports 7474/7687 are available, verify Docker has enough memory. **Plugin not loaded**: Check DozerDB documentation for current plugin installation procedures. **Check logs**: `docker logs $(docker ps -q --filter ancestor=graphstack/dozerdb)` ## Links - [DozerDB Website](https://dozerdb.org/) - [DozerDB Documentation](https://dozerdb.org/)