TITAN

I connected to a remote gremlin server via gremlin groovy shell. Connection succeeded. But for any remote command I try to execute it gives timeout error. Even for command :> 1+1 gremlin> :remote connect tinkerpop.server conf/senthil.yaml ==>Connected - 10.40.40.65/10.40.40.65:50080 gremlin> :> 1+1 Host did not respond in a timely fashion - check the server status and submit again. Display stack trace? [yN] org.apache.tinkerpop.gremlin.groovy.plugin.RemoteException: Host did not respond in a timely fashion - check the server status and submit again. at org.apache.tinkerpop.gremlin.console

I am running JanusGraph (0.1.0) with Spark (1.6.1) on a single machine. I did my configuration as described here . When accessing the graph on the gremlin-console with the SparkGraphComputer, it is always empty. I cannot find any error in the logfiles, it is just an empty graph. Is anyone using JanusGraph with Spark and can share his configuration and properties? Using a JanusGraph, I get the expected Output: gremlin> graph=JanusGraphFactory.open('conf/test.properties') ==>standardjanusgraph[cassandrathrift:[127.0.0.1]] gremlin> g=graph.traversal() ==>graphtraversalsource[standardjanusgraph

I am researching Titan (on HBase) as a candidate for a large, distributed graph database. We require both OLTP access (fast, multi-hop queries over the graph) and OLAP access (loading all - or at least a large portion - of the graph into Spark for analytics). From what I understand, I can use the Gremlin server to handle OLTP-style queries where my result-set will be small. Since my queries will be generated by a UI I can use an API to interface with the Gremlin server. So far, so good. The problem concerns the OLAP use case. Since the data in HBase will be co-located with the Spark executors,

I need some help to be confirm my choice... and to learn if you can give me some information. My storage database is TitanDb with Cassandra. I have a very large graph. My goal is to use Mllib on the graph latter. My first idea : use Titan with GraphX but I did not found anything or in development in progress... TinkerPop is not ready yet. So I have a look to Giraph. TinkerPop, Titan can communique with Rexster from TinkerPop. My question is : What are the benefit to use Giraph ? Gremlin seems to do the same think and is distributed. Thank you very much to explain me. I think I don't really

I use Titan 0.4.0 All, running Rexster in shared VM mode on Ubuntu 12.04. How could I properly delete a graph in Titan which is using the Cassandra storage backend? I have tried the TitanCleanup.clear(graph) , but it does not delete everything. The indices are still there. My real issue is that I have an index which I don't want (it crashes every query), however as I understand Titan's documentation it is impossible to remove an index once it is created . You can clear all the edges/vertices with: g.V.remove() but as you have found that won't clear the types/indices previously created. The