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Services, resources, tosca type definitions, users etc are all stored by SDC in a janusgraph DB in the sdctitan table in the cassandra DB. The following details how the information stored in the janusgraph can be viewed

1. Run janusgraph server
   1. This docker-compose file​ can be used to start up a janusgraph server can then be used to read from the DB​​​
      • ​set your ip address in the docker-compose file​​
        • If you are using a local DB use the following command to get your local ip
          • ip route get 8.8.8.8 | awk '/src/{ print $7 }'
      • ​docker-compose -f docker-compose-cql-es.yml up
2. ​Start gemlin​​
   1. Login to the janusgraph server
      • docker exec -it jce-janusgraph bash
   2. Start gremlin
      • bin/gremlin.sh
3. ​Read
   1. Connect to the graph
      • :remote connect tinkerpop.server conf/remote.yaml
   2. Use gremlin query commands to execute queries to the DB, for example (note the ":>" is part of the command):
      • :> g.V() - list all vertices
      • ​​​​:> g.V().has('name', 'myService') - list vertices with name 'myService'
      • :> g.V().has('name', 'myService').valueMap() - show details of vertices with name 'myService'
      • :> g.V().has('name', 'myService').properties() - properties of vertices with name 'myService'
      • :> g.V().has('name', 'myService').properties('metadata').value() - value of the property "metadata" of vertices with name 'myService'
      • :> g.V().has('nodeLabel', 'dataType') - data type vertices
        • :> g.V().has('nodeLabel', 'dataType').count() - total of data type vertices
        • :> g.V().has('name', 'ericsson.datatypes.nfv.InstantiateVnfOperationAdditionalParameters').properties()
      • node types (VFCs)
        • All node types
          • :> g.V().has('nodeLabel', 'node_type')
        • All nodes that derives from tosca.nodes.Root
          • :> g.V().has('nodeLabel', 'node_type').has('toscaResourceName', 'tosca.nodes.Root').in('DERIVED_FROM')
      • ​model
        • Model with given name
          • :> g.V().has('name', 'ETSI SOL001 v2.5.1')​​
        • Model with given id
          • :> g.V().has('uid', 'model.ETSI SOL001 v2.5.1')
        • All models
          • :> g.V().has('nodeLabel', 'model')
        • All Service Templates (Service, VF, PNF, etc.) that is associated to the model​
          • :> ​g.V().has('uid', 'model.ETSI SOL001 v2.5.1').out('MODEL_ELEMENT').has('nodeLabel', 'topology_template')
4. Export
   1. The entire graph can be exported for viewing with a compatible tool by using the following gremlin command which exports to a file with the given name
      • :> graph.io(graphml()).writeGraph("export.xml")​​
5. View
   1. ​Cytoscape can be used to view the exported graph. It can be downloded from:
      • https://cytoscape.org/
   2. Once running, select the below to import the graph:
      • ​File -> Import -> Network From File ​