gremlin

Can anyone supply some sample code or hints on how to import a 1MB CSV of nodes, and another 1MB CSV of edges, into Titan graph database running on Cassandra? I've got small CSV files importing via Gremlin, but this doesn't seem appropriate for large files. I've seen Faunus can do this, but I'd like to avoid spending a couple of days setting it up if possible. It looks like BatchGraph might be the way to go ( https://github.com/tinkerpop/blueprints/wiki/Batch-Implementation ) but the example appears to be incomplete. My question was answered at https://groups.google.com/forum/#!topic

I am new to Gremlin query language. I have to insert data on a Cosmos DB graph (using Gremlin.Net package), whether the Vertex (or Edge) already exists in the graph or not. If the data exists, I only need to update the properties. I wanted to use this kind of pattern: g.V().hasLabel('event').has('id','1').tryNext().orElseGet {g.addV('event').has('id','1')} But it is not supported by Gremlin.Net / Cosmos DB graph API. Is there a way to make a kind of upsert query in a single query ? Thanks in advance. There are a number of ways to do this but I think that the TinkerPop community has generally

I know how to remove a vertex by id, but I need to delete multiple vertices (clean the db). Deleting 1 v is like this: ver = g.v(1) g.removeVertex(ver) Peter Neubauer you can try g.V.each{g.removeVertex(it)} g.commit() In more recent terms as of Gremlin 2.3.0, removal of all vertices would be best accomplished with: g.V.remove() UPDATE: For version Gremlin 3.x you would use drop() : gremlin> graph = TinkerFactory.createModern() ==>tinkergraph[vertices:6 edges:6] gremlin> g = graph.traversal() ==>graphtraversalsource[tinkergraph[vertices:6 edges:6], standard] gremlin> g.V().drop().iterate()

Consider instagram feed scenario. I want to get all the posts 'posted' by the people I follow. For each of these posts I want to know whether I have liked it or not and also know which of the other people I follow have liked it (if any). What is the best solution to get this in gremlin (possibly avoiding duplication)? Image for clarity The following just gives the posts 'posted' by USER 2. How to get other information in the same query? g.V().has('ID','USER 2').out('posted') When you ask questions about Gremlin, especially one of this complexity, it is always best to include a Gremlin script

In Tinkerpop 3, how to perform pagination? I want to fetch the first 10 elements of a query, then the next 10 without having to load them all in memory. For example, the query below returns 1000,000 records. I want to fetch them 10 by 10 without loading all the 1000,000 at once. g.V().has("key", value).limit(10) Edit A solution that works through HttpChannelizer on Gremlin Server would be ideal. From a functional perspective, a nice looking bit of Gremlin for paging would be: gremlin> g.V().hasLabel('person').fold().as('persons','count'). select('persons','count'). by(range(local, 0, 2)). by