Deployment

This page contains information on how to deploy the LinkGate graph visualization environment as well as information on Bibliotheca Alexandrina's current deployment.

How to deploy

Of the 3 software components that make up LinkGate, link-serv (the link service) and link-viz (the link visualizer) are deployed as network services, while link-indexer is deployed as a command-line tool to be executed on source data storage.

Current deployment

At the present time, Bibliotheca Alexandrina has a deployment of link-serv and link-viz on Microsoft Azure, which is described in the following table:

VM name	Function	Server software	VM size	Specs	Disks
link-serv1	Link Service	tomcat9	B2s	2 cores, 4 GB memory	30 GB SSD (OS disk)
link-serv2	Link Service	tomcat9	E2s_v3	2 cores, 16 GB memory	30 GB SSD (OS disk)
link-data1	Link Service - graph data store - Neo4j	neo4j	A8m_v2	8 cores, 64 GB memory	30 GB SSD (OS disk), 4096 GB HDD (/srv)
link-data2	Link Service - graph data store - Neo4j	neo4j	E2s_v3	2 cores, 16 GB memory	30 GB HDD (OS disk), 512 GB HDD (/srv)
link-data3	Link Service - graph data store - Neo4j	neo4j	E2s_v3	2 cores, 16 GB memory	30 GB SSD (OS disk), 512 GB HDD (/srv)
link-data4	Link Service - graph data store - Neo4j	neo4j	E2s_v3	2 cores, 16 GB memory	30 GB SSD (OS disk), 512 GB HDD (/srv)
link-data5	Link Service - graph data store - ArangoDB	arangodb	E2s_v3	2 cores, 16 GB memory	30 GB HDD (OS disk), 512 GB HDD (/srv)
link-data6	Link Service - graph data store - ArangoDB	arangodb	E2s_v3	2 cores, 16 GB memory	30 GB HDD (OS disk), 512 GB HDD (/srv)
link-data7	Link Service - graph data store - ArangoDB	arangodb	E2s_v3	2 cores, 16 GB memory	30 GB HDD (OS disk), 512 GB HDD (/srv)
link-data8	Link Service - graph data store - ArangoDB	arangodb	E2s_v3	2 cores, 16 GB memory	30 GB HDD (OS disk), 512 GB HDD (/srv)
link-viz	Link Visualizer	nginx	B2s	2 cores, 4 GB memory	30 GB SSD (OS disk)

All virtual machines are Ubuntu 18.04 LTS.