Machine-learning-using-BigData

Neo4J:

1. Hetionet : Integrating Biology into a Public Neo4j Database

Cypher Commands :

1. Delete relationship:

   • f""" MATCH()-[r:"RELATION_NAME"]-() DELETE r """

2. Create relationship:

   • f"""MATCH (a:"nodeName1"), (b:"nodeName2")where nodeName1.attribute="value" and nodeName2.attribute="value" CREATE (a)-[r:"RelationName"]->(b) RETURN type(r), r.name"""

3. Create node:

   • f"""CREATE ( Disease : Disease{{ id : "{line[0]}", name : "{line[1]}", kind : "{line[2]}" }})"""

4. Find relationship of a noe:

   • f"""MATCH p=()-[r:"relationshipName"]->() RETURN p LIMIT 25"""

5. Delete all relationship of a node:

   • f"""MATCH ()-[r:"relationshipName"]-() delete r

Cassandra:

Hadoop:

1. hdfs namenode -formate
2. start-all.cmd
3. resource-manager: all map-reduce programs that are executed in the system http://localhost:8088/cluster
4. namenode UI: http://localhost:50070/dfshealth.html#tab-overview
5. copy file to hadoop directory: hadoop fs -mkdir "filename"