将hadoop连接到neo4j

Question

I want to import a GML file (Graphml file) from hadoop to neo4j , for that I need to do connection between hadoop and neo4j, I checked the neo4j site but I didn't find anything : https://neo4j.com/developer/apache-hadoop/ this is what they say for the connection between hadoop and neo4j :

In the past there were some approaches that used Hadoop to quickly generate `Neo4j datastores directly. While this approach is performant, it is also tightly coupled to the store-format of a certain Neo4j version as it has to duplicate the functionality of writing to split-up store-files. With the parallel neo4j-import tool and APIs introduced in Neo4j 2.2, such a solution is no longer needed. The import facilities scale across a large number of CPUs to maximize import performance.

Can anyone explain me what does that mean ? thank you

Answer 1

Maybe I'm not understanding exactly what you're trying to accomplish, but if you have the GraphML file you don't need a connection to hadoop, just copy the file to the Neo4j instance or serve it over the web.

GraphML import is available in Neo4j through the use of apoc.import.graphml procedure . For example:

CALL apoc.import.graphml("graph.gml", {batchSize: 10000, readLabels: true, storeNodeIds: false, defaultRelationshipType:"RELATED"};