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Questions tagged [titan]

Titan is a highly scalable graph database optimized for storing and querying massive-scale graphs containing billions of vertices and edges distributed across a multi-machine cluster

Titan is a highly scalable graph database optimized for storing and querying massive-scale graphs containing billions of vertices and edges distributed across a multi-machine cluster.

Titan is a transactional database that can support thousands of concurrent users.

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951 questions
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titan- elasticseach and com.thinkaurelius.titan.diskstorage.es.ElasticSearchIndex

I am a newbie with titan. I am using ubuntu 12.04 and using cassandra 2.0 and ES 1.0 installed from deb packages. I am trying to get ES to work with titan. gremlin> g =…
Tampa
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Titan Graph: Group by query for specific vertex

I have following situation: User (userId,Name) Group (groupId,groupName,createdTime) User ------ created -------> Group1 User ------ created -------> Group2 User ------ created -------> Group3 I want to get the list of group created by user in…
Manish Kumar
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Implementing Q/A scenario with Graph Database

I wanted to know that am I implementing a Graph DB scanerio correct or not. I am trying with Titan Graph Database and neo4j user-1 has asked a question this is question1 to user-2 user-2 replied to that question user-3 also replied to that…
Manish Kumar
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how to create a vertex centric index using blueprints api for Titan?

I have a super node situation in my graph and I am trying to query edges of a particular vertex. I can see that titan supports vertex centric indices however, the Wiki documentation has the groovy code and I cannot find any method as sortKey(). I…
user2611221
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Titan/ES: Could not commit transaction due to exception in persistence

I'm having trouble trying to create and use indexed types in Titan using ElasticSearch. I'm using Titan Server 0.4.0 and have a groovy script that does the following: Sets the…
adaml288
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GremlinPipeline returns different results with Titan and OrientDB

I am trying to find the shortest path with GremlinPipeline using the following code: final GremlinPipeline pathPipe = new GremlinPipeline(v1) .as("similar") .both("similar") …
salvador
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Titan order by ES indexed vertex property?

Per the latest Titan 0.4.1 docs, this code should work to order vertices in a result set: graph.query().has("name",CONTAINS,"john").orderBy("age",Order.DESC).limit(10).vertices() I would like to perform this type of query across a potentially large…
bcm360
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Complex Gremlin queries to output nodes/edges

I am trying to implement a query and graph visualisation framework that allows a user to enter a Gremlin query, returning a D3 graph of results. The D3 graph is built using a JSON - this is created using separate vertices and edges outputs from the…
adaml288
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Gremlin 'except' usage doesnt seem to work

I am trying to find vertices except for some specific ones and this query below doesnt work: g.V() .has('someId') .except([g.V().has('someId').has('some_other_filter')]) Is this usage of 'except' where I provide it a query within it not…
sharmami
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Titan server start fails

I see the following message when starting titan-server: Caused by: InvalidRequestException(why:Keyspace names must be case-insensitively unique ("titan" conflicts with "titan")) at…
sharmami
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Titan getVertices() function never ends

I have the following code that creates a graph database using Titan: public class TitanMassiveInsertion { private TitanGraph titanGraph = null; private BatchGraph batchGraph = null; public static void main(String args[]) { …
salvador
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Titan edge properties in Gremlin

quick question regarding querying a graph database in Titan using a Cassandra back end. Splitting the problem down into it's simplest form, say I have a relationship that goes something like this: node1 ----------> node2 When loading in data, I have…
adaml288
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Gremlin using pipe output as an input again

I have a graph which looks like a --father_of--> 1 --wife_of--> b --father_of-->2 --wife_of--> c --father_of--> 3--wife_of--> d --father_of --> 5--wife_of-->e I want to write a query which gives me all fathers in the tree starting from a I can get…
Skynet
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Titan-all gradle pull fails

I am pulling the latest titan [on windows as well as ubuntu] compile group: 'com.thinkaurelius.titan', name:'titan-all', version:'0.4.0' and I see the following error : Download…
sharmami
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Can't update HashMap in Titan created via RexPro

I'm running Titan 0.3.2 with Cassandra as a data store. I'm also using rexpro-python for interacting with Titan over RexPro. Issue & Question: If I run this Python code: >>> import rexpro >>> conn = rexpro.RexProConnection('localhost', 8184,…
bcm360
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