graph_databases.txt

neo4j vs orientdb

The comparisons are clearly in favor of Neo4j. 
The only thing that sets OrientDB apart is that 
it's a "jack of all trades": 
  it's Document store, Graph DBMS, and Key-value store
  
 - https://stackshare.io/stackups/neo4j-vs-orientdb
 - https://db-engines.com/en/system/Neo4j%3BOrientDB

JanusGraph (2017)
 - https://janusgraph.org/
Fork from TitanDB (2012)
Which was acquired by Data Stax
   https://en.wikipedia.org/wiki/DataStax
Uses native gremlin drivers (Java)
Gremlin is from Tinkerpop
 - http://tinkerpop.apache.org/

Orientdb - multi-modal database
Proprietary query api
    https://orientdb.org/

RDF index
RDF = Resource Description Framework - a graph data modeli
      that formally describes the semantics, or meaning of information. 
      It also represents metadata, that is, data about data. 
      RDF consists of triples. ... i
      The parts of a triple (subject, predicate, object) represent links in a graph.

AWS:
Amazon Neptune - Fast, reliable graph database built for the cloud
 - https://aws.amazon.com/neptune/

Azure:
Neo4j on Azure:
 - https://neo4j.com/partners/microsoft-azure/
Cosmos DB can work as Graph DB:
 - https://docs.microsoft.com/en-us/azure/cosmos-db/graph-introduction

Google Cloud:
Running JanusGraph with Cloud Bigtable
 - https://cloud.google.com/architecture/running-janusgraph-with-bigtable
Neo4j Auro on GCP:
 - https://neo4j.com/neo4j-for-google-cloud/