JanusGraph Installation and Use

JanusGraph is a distributed Graph database based on the open source project of Apache TinkerPop and Apache Cassandra. It provides a scalable, high-performance Graph database system for storing and processing large-scale graph datasets. Install JanusGraph: 1. Download the compressed package of JanusGraph: You can download it from JanusGraph's official website（ https://janusgraph.org/ ）Download the latest version of the compressed package from. 2. Decompress the compressed package: Extract the downloaded compressed package to the directory of your choice. 3. Configure JanusGraph: Enter the extracted directory, edit the conf/gremlin server/Janusgraph passandra. properties file, and configure Cassandra related parameters, including Cassandra's IP address, port number, username, and password. 4. Start the JanusGraph server: In the extracted directory, run bin/gremlin server.sh (or bin/gremlin server. bat) to start the JanusGraph server. Create a data table: 1. Use the Gremlin console: Open the Gremlin console and run the following command to connect to the JanusGraph server: :remote connect tinkerpop.server conf/remote.yaml 2. Create a schema: Run the following command to create a schema, defining labels, attributes, and indexes for vertices and edges: graph = JanusGraphFactory.open('conf/gremlin-server/janusgraph-cassandra.properties') mgmt = graph.openManagement() personVertex = mgmt.makeVertexLabel('person').make() nameProperty = mgmt.makePropertyKey('name').dataType(String.class).cardinality(Cardinality.SINGLE).make() ageProperty = mgmt.makePropertyKey('age').dataType(Integer.class).cardinality(Cardinality.SINGLE).make() mgmt.addProperties(personVertex, nameProperty, ageProperty) graph.tx().commit() mgmt.awaitGraphIndexStatus(graph, 'personByAge').call() 3. Create data insertion, modification, query, and deletion: Here are some example commands for data insertion, modification, query, and deletion: -Insert data: john = graph.addVertex(T.label, 'person', 'name', 'John', 'age', 25) -Modify attributes: john.property('age', 26) -Query data: graph.traversal().V().has('person', 'name', 'John').values('age') -Delete data: graph.traversal().V().has('person', 'name', 'John').drop().iterate() Note: After making any queries or modifications, it is necessary to use 'graph. tx(). commit()' to commit the transaction. The above is an introduction to the installation and basic usage of JanusGraph. For detailed usage methods, please refer to the official documentation of JanusGraph.