JanusGraph

What JanusGraph is

JanusGraph is a free, open-source distributed graph database for storing and querying graphs across multiple machines. The project describes support for graphs with hundreds of billions of vertices and edges, thousands of concurrent users, and real-time graph traversals. Transactions can be ACID or eventually consistent. JanusGraph provides elastic linear scalability, data distribution and replication, multi-datacenter high availability, and hot backups. Native Apache TinkerPop integration includes Gremlin, Gremlin Server, and Gremlin Console. Listed storage backends are Apache Cassandra, Apache HBase, Google Cloud Bigtable, Oracle BerkeleyDB, and ScyllaDB. Optional full-text, geographic, and numeric range search can use Elasticsearch, Apache Solr, or Apache Lucene. Apache Spark integration supports global graph analytics. The project lists community adapters for Aerospike, DynamoDB, and FoundationDB. It is governed by the Linux Foundation, uses the Apache 2.0 license, and states that all functionality is free without a commercial license. Community help is available through Discord, a users mailing list, Stack Overflow, and GitHub. Deployment is self-hosted on Linux.