...

Pre-requisites

1.  Ensure you have the syndeia-cloud-3.4_janusgraph_setup.zip downloaded to  (or latest service pack) downloaded to your home directory (or home directory's Downloads folder) from the download/license instructions sent out by our team.  

  Note: the .ZIP will pre-create a separate folder for its contents when extracted so there is no need to pre-create a separate folder for it.  

2.  Ensure you satisfy Janusgraph's pre-requisites, ie: have (Open|Oracle)JDK/JRE + Apache Cassandra (& optionally Elasticsearch) installed.  Re. CPU, memory, HD space, etc. this will depend on how much data you expect to store, query, and graph.  

3.  If using a firewall, and JG will be on a separate server from SC, ensure the following port is accessible (consult your local network admin if required): TCP port 8182 (this is the port to listen to for client connections).  

...

Downloading & Extracting JanusGraph

...

3. Unzip Syndeia Cloud's JanusGraph setup package in your home directory ~/, ie:  unzip syndeia-cloud-3.4.SP3_2022-07-01_janusgraph_setup.zip -d ~/

...

5. Take ownership of the extracted folder, ie:  sudo chown -R janusgraph:janusgraph /opt/janusgraph-0.3.1-hadoop2

JanusGraph Keyspace Setup, Service Setup & Start:

6. In a new terminal session, cd into the bin dir and run the Syndeia Cloud JanusGraph setup script, ie:  cd ~/syndeia-cloud-3.4_janusgraph_setup/bin; ./

...

JanusGraph Keyspace Setup, Service Setup & Start:

6. In a new terminal session, cd into the bin dir and run the Syndeia Cloud JanusGraph setup script, ie:  cd ~/syndeia-cloud-3.4_janusgraph_setup./bin; ./syndeia-cloud-3.4_janusgraph_setup.bash.  This will:  

- Create/update janusgraph-current symlink to specified version, default = 0.3.1
- Create a new syndeia_admin superuser in Cassandra with a password you specify
- Create a new syndeia_cloud_graph and syndeia_cloud_graph_config keyspaces
- GRANT ALL PERMISSIONS ON KEYSPACE syndeia_cloud_graph TO syndeia_admin
- GRANT ALL PERMISSIONS ON KEYSPACE syndeia_cloud_graph_config TO syndeia_admin
- Run a Groovy JanusGraph setup script to set storage params for your graph and build indexes
- Create a renamed copy of the file /opt/janusgraph-<release_ver>/conf/janusgraph-cql-configurationgraph.properties as janusgraph-cql-configurationgraph-syndeia.properties with: 

graph.graphname=syndeia_cloud_graph_config
Add storage.username=syndeia_admin
Add storage.password=<password_specified>
storage.hostname=<your_Cassandra_host>

- If you installed Elasticsearch on the same machine, add index.search.backend=elasticsearch and index.search.hostname=localhost to use Elasticsearch for search indexing
- Create a renamed copy of the file /opt/janusgraph-<release_ver>/conf/gremlin-server/gremlin-server-configuration.yaml as gremlin-server-configuration-syndeia.yaml and set ConfigurationManagementGraph to point to janusgraph-cql-configurationgraph-syndeia.properties.  
- Install systemd .service file for JanusGraph service
- Start JanusGraph service

   Note: you may be prompted for sudo authentication,.  you You will also be prompted for your cassandra account password (default = cassandra), to set your syndeia_admin password and the FQDN of your Cassandra host.  

  Avoid any all of the following special characters: \?*[]+#&.{}$ when setting your syndeia_admin password.

Managing JanusGraph:

7. To check the status of Syndeia Cloud services, use systemctl status janusgraph.  You can verify that it started by verifying "Active: active (running)" shows up in the output: 

$ systemctl status janusgraph
● janusgraph.service
   Loaded: loaded (/etc/systemd/system/janusgraph.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2019-04-17 10:21:59 EDT; 7s ago
  Process: 22486 ExecStop=/bin/bash -c /opt/janusgraph-0.3.1-hadoop2/bin/janusgraph.sh stop (code=exited, status=0/SUCCESS)
 Main PID: 23677 (java)
   CGroup: /system.slice/janusgraph.service
           └─23677 java -server -Djanusgraph.logdir=/opt/janusgraph-0.3.1-hadoop2/bin/../log -Dlog4j.configuration=conf/gremlin-server/log4j-server.properties -Xms32m -Xmx512m -javaagent:

8. To stop/start the Syndeia Cloud services, use sudo systemctl <action> janusgraph; where <action> = one of start|stop.  If the service successfully starts you should get the command prompt again. 

  Note: If you wish to ensure the services run on startup, run sudo systemctl enable janusgraph.  For more information on installing the .service files manually and configuring them to start after Cassandra, see Setting up Services to Start on Boot.  

...

...

Managing JanusGraph:

7. To check the status of JanusGraph services, use systemctl status janusgraph.  You can verify that it started by verifying "Active: active (running)" shows up in the output: 

$ systemctl status janusgraph
● janusgraph.service
   Loaded: loaded (/etc/systemd/system/janusgraph.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2019-04-17 10:21:59 EDT; 7s ago
  Process: 22486 ExecStop=/bin/bash -c /opt/janusgraph-0.3.1-hadoop2/

...

bin/

...

janusgraph.sh stop (code=exited, status=0/SUCCESS)
 Main PID: 23677 (java)
   CGroup: /system.slice/janusgraph.service
           └─23677 java -server -Djanusgraph.logdir=/opt/janusgraph-0.3.1-hadoop2/

...

$ less /var/log/janusgraph/gremlin-server.log
[...]
2987 [main] INFO  com.datastax.driver.core.NettyUtil  - Found Netty's native epoll transport in the classpath, using it
4827 [main] INFO  com.datastax.driver.core.policies.DCAwareRoundRobinPolicy  - Using data-center name 'datacenter1' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the c
orrect datacenter name with DCAwareRoundRobinPolicy constructor)
4835 [main] INFO  com.datastax.driver.core.Cluster  - New Cassandra host janusgraph.domain.com/localhost:9042 added
9043 [main] INFO  org.janusgraph.graphdb.configuration.GraphDatabaseConfiguration  - Set default timestamp provider MICRO
11325 [main] INFO  org.janusgraph.graphdb.configuration.GraphDatabaseConfiguration  - Generated unique-instance-id=2d3877742385-janusgraph-domain-com1
11341bin/../log -Dlog4j.configuration=conf/gremlin-server/log4j-server.properties -Xms32m -Xmx512m -javaagent:

8. To stop/start the JanusGraph services, use sudo systemctl <action> janusgraph; where <action> = one of start|stop.  If the service successfully starts you should get the command prompt again. 

  Note: If you wish to ensure the services run on startup, run sudo systemctl enable janusgraph.  For more information on installing the .service files manually and configuring them to start after Cassandra, see Setting up Services to Start on Boot.  

9. To view the logs for JanusGraph, use sudo journalctl -eu janusgraph & less /opt/janusgraph-0.3.1-hadoop2/log/gremlin-server.log.  To follow the log files, you can use sudo journalctl -feu janusgraph & tail -f /opt/janusgraph-0.3.1-hadoop2/log/gremlin-server.log.  You should see output similar to the following (abridged) text:

 Note, for your convenience you may wish to create a symlink to /opt/janusgraph-0.3.1-hadoop2/log/ from /var/log, ie: sudo ln -nfs /opt/janusgraph-0.3.1-hadoop2/log/ /var/log/janusgraph

$ less /var/log/janusgraph/gremlin-server.log
[...]
2987 [main] INFO  com.datastax.driver.core.ClockFactoryNettyUtil  - Using java.lang.System clock to generate timestamps.
11902Found Netty's native epoll transport in the classpath, using it
4827 [main] INFO  com.datastax.driver.core.policies.DCAwareRoundRobinPolicy  - Using data-center name 'datacenter1' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the correctc
orrect datacenter name with DCAwareRoundRobinPolicy constructor)
119024835 [main] INFO  com.datastax.driver.core.Cluster  - New Cassandra host janusgraph.domain.com/localhost:9042 added
122519043 [main] INFO  org.janusgraph.graphdb.diskstorageconfiguration.BackendGraphDatabaseConfiguration  - InitiatedSet backenddefault operationstimestamp threadprovider pool of size 8
27969 MICRO
11325 [main] INFO  org.janusgraph.graphdb.diskstorageconfiguration.BackendGraphDatabaseConfiguration  - Configuring total store cache size: 208138508
33098 [main] INFO  org.janusgraph.diskstorage.log.kcvs.KCVSLogGenerated unique-instance-id=2d3877742385-janusgraph-domain-com1
11341 [main] INFO  com.datastax.driver.core.ClockFactory  - Loaded unidentified ReadMarker start time 2019-03-18T01:55:02.918Z into org.janusgraph.diskstorage.log.kcvs.KCVSLog$Messa
gePuller@28d6290
35668 Using java.lang.System clock to generate timestamps.
11902 [main] INFO  orgcom.apachedatastax.tinkerpopdriver.gremlincore.serverpolicies.util.ServerGremlinExecutorDCAwareRoundRobinPolicy  - Initialized Gremlin thread pool.  Threads in pool named with pattern gremlin-*
36019Using data-center name 'datacenter1' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the
correct datacenter name with DCAwareRoundRobinPolicy constructor)
11902 [main] INFO  orgcom.apachedatastax.tinkerpopdriver.gremlin.server.util.ServerGremlinExecutorcore.Cluster  - InitializedNew GremlinExecutorCassandra and preparing GremlinScriptEngines instances.
40510host janusgraph.domain.com/localhost:9042 added
12251 [main] INFO  org.apachejanusgraph.tinkerpop.gremlin.server.util.ServerGremlinExecutordiskstorage.Backend  - Initiated backend Initializedoperations gremlin-groovythread GremlinScriptEnginepool andof registeredsize metrics8
4053227969 [main] INFO  org.apachejanusgraph.tinkerpop.gremlin.server.op.OpLoaderdiskstorage.Backend  - Configuring Addingtotal store thecache standardsize: OpProcessor.208138508
4054033098 [main] INFO  org.apachejanusgraph.tinkerpopdiskstorage.gremlinlog.serverkcvs.op.OpLoaderKCVSLog  - Adding the session OpProcessor.
41030Loaded unidentified ReadMarker start time 2019-03-18T01:55:02.918Z into org.janusgraph.diskstorage.log.kcvs.KCVSLog$Messa
gePuller@28d6290
35668 [main] INFO  org.apache.tinkerpop.gremlin.server.oputil.OpLoaderServerGremlinExecutor  - AddingInitialized theGremlin traversalthread OpProcessor.
41076pool.  Threads in pool named with pattern gremlin-*
36019 [main] INFO  org.apache.tinkerpop.gremlin.server.oputil.traversal.TraversalOpProcessorServerGremlinExecutor  - Initialized cacheGremlinExecutor forand TraversalOpProcessorpreparing withGremlinScriptEngines size 1000 and expiration time of 600000 ms
41097instances.
40510 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServerutil.ServerGremlinExecutor  - idleConnectionTimeout was set to 0 which resolves to 0 seconds when configuring this value - this feature will be d
isabled
41098 Initialized gremlin-groovy GremlinScriptEngine and registered metrics
40532 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServerop.OpLoader  - keepAliveIntervalAdding wasthe setstandard to 0 which resolves to 0 seconds when configuring this value - this feature will be disab
led
41247 OpProcessor.
40540 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizerop.OpLoader  - Configured application/vnd.gremlin-v3.0+gryo with org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializ
erV3d0
41248 Adding the session OpProcessor.
41030 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizerop.OpLoader  - Adding the Configuredtraversal application/vnd.gremlin-v3.0+gryo-stringd withOpProcessor.
41076 [main] INFO  org.apache.tinkerpop.gremlin.server.driverop.ser.GryoMessage
SerializerV3d0
41298traversal.TraversalOpProcessor  - Initialized cache for TraversalOpProcessor with size 1000 and expiration time of 600000 ms
41097 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizerGremlinServer  - Configured application/vnd.gremlin-v3.0+json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSeri
alizerV3d0
41299 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0
41306idleConnectionTimeout was set to 0 which resolves to 0 seconds when configuring this value - this feature will be d
isabled
41098 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - keepAliveInterval was set to 0 which resolves to 0 seconds when configuring this value - this feature will be disab
led
41247 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v1v3.0+gryo with org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializ
erV1d0erV3d0
4131141248 [main] WARNINFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - TheConfigured org.application/vnd.gremlin-v3.0+gryo-stringd with org.apache.tinkerpop.gremlin.driver.ser.GryoLiteMessageSerializerV1d0GryoMessage
serialization class is deprecated.
41314SerializerV3d0
41298 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v1v3.0+gryo-litejson with org.apache.tinkerpop.gremlin.driver.ser.GryoLiteMessagGraphSONMessageSeri
eSerializerV1d0alizerV3d0
4131541299 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v1.0+gryo-stringdjson with org.apache.tinkerpop.gremlin.driver.ser.GryoMessageGraphSONMessageSerializerV3d0
SerializerV1d0
4132541306 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v2v1.0+jsongryo with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSeriGryoMessageSerializ
alizerGremlinV2d0erV1d0
4134741311 [main] INFOWARN  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v1.0+json with org.apache.tinkerpop.gremlinThe org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSeri
alizerGremlinV1d0
41350GryoLiteMessageSerializerV1d0 serialization class is deprecated.
41314 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/json already hasvnd.gremlin-v1.0+gryo-lite with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0GryoLiteMessag
configuredeSerializerV1d0
41315 -[main] itINFO will not be replaced by org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0.
41437 [gremlin-server-boss-1] INFO  server.AbstractChannelizer  - Configured application/vnd.gremlin-v1.0+gryo-stringd with org.apache.tinkerpop.gremlin.driver.serverser.GremlinServerGryoMessage
 - Gremlin Server configured with worker thread pool of 1, gremlin pool of 4 and boss thread pool of
1.
41438 [gremlin-server-boss-1SerializerV1d0
41325 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServerAbstractChannelizer  - Channel started at port 8182.
181192 [metrics-logger-reporter-thread-1Configured application/vnd.gremlin-v2.0+json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSeri
alizerGremlinV2d0
41347 [main] INFO  org.apache.tinkerpop.gremlin.server.Settings$Slf4jReporterMetricsAbstractChannelizer  - type=GAUGE, name= Configured application/vnd.gremlin-v1.0+json with org.apache.tinkerpop.gremlin.serverdriver.GremlinServerser.gre
mlin-groovy.sessionless.class-cache.average-load-penalty, value=2.450843818E9

10.  Validate correct operation and create/update an archive image to use as a new base image if the node needs to be rebuilt or if you wish to create a cluster. 

  Before making the image you may wish to first stop and optionally disable the service temporarily to prevent auto-start on boot, ie:  sudo systemctl disable janusgraph.  

Multi-Node (Cluster) Setup Instructions

Enabling your single-node deployment for cluster operation

11. Ensure you first enable Cassandra for cluster operation.   
12. Update the Janusgraph syndeia_cloud_graph configuration via the following Groovy code; where cassandra.mydomain.com = the FQDN of the server that you have now exposed :  

:remote connect tinkerpop.server conf/remote.yaml session
:remote console
map = new HashMap();
map.put('storage.backend', 'cql');
// should return: ==>null
map.put('storage.hostname', 'cassandra.mydomain.com');
ConfiguredGraphFactory.updateConfiguration('syndeia_cloud_graph', map);

Adding new nodes to an existing single-node

13. Deploy another instance of your Janusgraph base image (which depending on your topology could be the same as your Cassandra base image).
14. Make any appropriate changes for the MAC address (ex: in the VM settings and/or udev, if used).
15. Setup forward & reverse DNS records on your DNS server (consult your IT admin/sysadmin if required) and set the hostname and primary DNS suffix on the machine itself (sudo hostnamectl set-hostname <new_JanusGraph_node_FQDN> where FQDN = Fully Qualified Domain Name, ex: janusgraph2.mycompany.com )
16. SSH to the IP (or the FQDN of the new node if DNS has already propagated).

Note: If using Fail2Ban, update the sender line in /etc/fail2ban/jail.local to root@<new_JanusGraph_node_FQDN>. Restart the fail2ban service (sudo systemctl restart fail2ban)

17. Three things need to occur:  you will need to change the Snitch (if not already done for Cassandra), alter the keyspace Replication Factor (RF), and run nodetool repair on each node (see https://docs.datastax.com/en/archived/cassandra/3.x/cassandra/operations/opsChangeKSStrategy.html for a summary of the process).

...

GraphSONMessageSeri
alizerGremlinV1d0
41350 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - application/json already has org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0 configured
 - it will not be replaced by org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0.
41437 [gremlin-server-boss-1] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Gremlin Server configured with worker thread pool of 1, gremlin pool of 4 and boss thread pool of
1.
41438 [gremlin-server-boss-1] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Channel started at port 8182.
181192 [metrics-logger-reporter-thread-1] INFO  org.apache.tinkerpop.gremlin.server.Settings$Slf4jReporterMetrics  - type=GAUGE, name=org.apache.tinkerpop.gremlin.server.GremlinServer.gre
mlin-groovy.sessionless.class-cache.average-load-penalty, value=2.450843818E9

10.  Validate correct operation and create/update an archive image to use as a new base image if the node needs to be rebuilt or if you wish to create a cluster. 

  Before making the image you may wish to first stop and optionally disable the service temporarily to prevent auto-start on boot, ie:  sudo systemctl disable janusgraph.  

...

Multi-Node (Cluster) Setup Instructions

Enabling your single-node deployment for cluster operation

11. If Cassandra will be on a separate server from JG, ensure you first enable Cassandra for cluster operation.   

12. Update the Janusgraph syndeia_cloud_graph configuration by running /opt/janusgraph-current/bin/gremlin.sh and running the following Groovy code ; where cassandra.mydomain.com = the FQDN of the Casandra server that you have now exposed :  

:remote connect tinkerpop.server conf/remote.yaml session
:remote console
map = new HashMap();
map.put('storage.backend', 'cql');  // should return: ==>null
map.put('storage.hostname', 'cassandra.mydomain.com');
ConfiguredGraphFactory.updateConfiguration('syndeia_cloud_graph', map);

13.  If Janusgraph will be on a different server than SC, please also:

13A.  Update the host: localhost entry on L1 in /opt/janusgraph-current/conf/gremlin-server/gremlin-server-configuration-syndeia.yaml, ex:  

host: jg-server.domain.tld
port: 8182

[...]

where jg-server.domain.tld = the FQDN of your JG server

13B.  Ensure port 8182 is accessible on the JG server. 

...

Adding new nodes to an existing single-node

14. Deploy another instance of your Janusgraph base image (which depending on your topology could be the same as your Cassandra base image).

15. Make any appropriate changes for the MAC address (ex: in the VM settings and/or udev, if used).

16. Setup forward & reverse DNS records on your DNS server (consult your IT admin/sysadmin if required) and set the hostname and primary DNS suffix on the machine itself (sudo hostnamectl set-hostname <new_JanusGraph_node_FQDN> where FQDN = Fully Qualified Domain Name, ex: janusgraph2.mycompany.com )

17. SSH to the IP (or the FQDN of the new node if DNS has already propagated).

Note: If using Fail2Ban, update the sender line in /etc/fail2ban/jail.local to root@<new_JanusGraph_node_FQDN>. Restart the fail2ban service (sudo systemctl restart fail2ban)

18. Three things need to occur:  you will need to change the Snitch (if not already done for Cassandra), alter the keyspace Replication Factor (RF), and run nodetool repair on each node (see https://docs.datastax.com/en/archived/cassandra/3.x/cassandra/operations/opsChangeKSStrategy.html for a summary of the process).

1. Change the Snitch:  see "Switching Snitches":  https://docs.datastax.com/en/archived/cassandra/3.x/cassandra/operations/opsChangeKSStrategy.html

2. Alter the RF:  verify the Cassandra “datacenter” name (default = dc1) from the CLI by running nodetool status and then from Cassandra CQLSH increment the RF for your JanusGraph keyspace(s):
   

   Code Block
   language sql
   ALTER KEYSPACE syndeia_cloud_auth WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', '<datacenter_name>' : <total_number_of_nodes> }; -- where <datacenter_name> = the name of the datacenter as shown via nodetool status, and <total_number_of_nodes> = total # of nodes (in the cluster) ALTER KEYSPACE syndeia_cloud_store WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', '<datacenter_name>' : <total_number_of_nodes> }; -- where <datacenter_name> = the name of the datacenter as shown via nodetool status, and <total_number_of_nodes> = total # of nodes (in the cluster) ALTER KEYSPACE syndeia_cloud_confluence WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', '<datacenter_name>' : <total_number_of_nodes> }; -- where <datacenter_name> = the name of the datacenter as shown via nodetool status, and <total_number_of_nodes> = total # of nodes (in the cluster) ALTER KEYSPACE syndeia_cloud_graph WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', '<datacenter_name>' : <total_number_of_nodes> }; -- where <datacenter_name> = the name of the datacenter as shown via nodetool status, and <total_number_of_nodes> = total # of nodes (in the cluster) ALTER KEYSPACE syndeia_cloud_graph_config WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', '<datacenter_name>' : <total_number_of_nodes> }; -- where <datacenter_name> = the name of the datacenter as shown via nodetool status, and <total_number_of_nodes> = total # of nodes (in the cluster)

   
   

3. Run nodetool repair:  Run nodetool repair --full <keyspace_name> on each node (for more details see https://docs.datastax.com/en/dse/5.1/cql/cql/cql_using/cqlUpdateKeyspaceRF.html)

1819. Follow  "Things to Consider in a Multi-Node JanusGraph Cluster" https://docs.janusgraph.org/0.3.1/things-to-consider-in-a-multi-node-janusgraph-cluster.html

1920. Repeat steps 13 14 ~ 18 19 for each additional cluster node.

...

Validating JanusGraph Operation for 1-node (or multiple nodes)

1921. To validate JanusGraph operation, we start a Gremlin client and issue commands to check the edges and vertices in our graph  To do this, perform the following steps:  

1921.1.  Open a new terminal window

1921.2.  Go to the bin folder in JanusGraph installation and type the following command:  ./gremlin.sh.  You should see output similar to the below:    

$ ./gremlin.sh 

         \,,,/
         (o o)
-----oOOo-(3)-oOOo-----
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/opt/janusgraph-0.3.1-hadoop2/lib/slf4j-log4j12-1.7.12.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/opt/janusgraph-0.3.1-hadoop2/lib/logback-classic-1.1.2.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
plugin activated: janusgraph.imports
plugin activated: tinkerpop.server
plugin activated: tinkerpop.utilities
20:19:16 WARN  org.apache.hadoop.util.NativeCodeLoader  - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
plugin activated: tinkerpop.hadoop
plugin activated: tinkerpop.spark
plugin activated: tinkerpop.tinkergraph
gremlin> 

1921.3.  Type the following commands, substituting your appropriate values as required:  

:remote connect tinkerpop.server conf/remote.yaml session
:remote console
graph = ConfiguredGraphFactory.open('syndeia_cloud_graph');
// should return: ==>standardjanusgraph[cql:[cassandra.mydomain.com]]
g = graph.traversal();
g.V();
g.E();

The last 2 commands above should not return any results since the graph (syndeia_cloud_graph) is empty - no vertices or edges.

1921.4.  Type :quit   

...