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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 vertex centric indices vs Neo4j labels

I was trying to make a comparison between these two technologies when approaching this and I was wondering if any of you already have some experience dealing with any or both of them? I am mainly interested in performance numbers when dealing with…
ppareja
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How to delete graph in Titan with Cassandra storage backend?

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…
Automatico
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Should I use TitanDB?

I am thinking of using TitanDB. It seems to really fit our needs (we have full control over the storage engine and we can build it on top of DynamoDB). However I am worried about the fact that the project is not maintained anymore and a fork was…
danielz
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How to increment a vertex property value in a TinkerPop graph

How would I traverse through a graph and increment a value of a vertex property? Either by some fixed amount or by an amount in a property of an edge leading to it. eg. with the following graph: gremlin> graph =…
Matt Hamilton
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Gremlin: What's an efficient way of finding an edge between two vertices?

So obviously, a straight forward way to find an edge between two vertices is to: graph.traversal().V(outVertex).bothE(edgeLabel).filter(__.otherV().is(inVertex)) I feel that filter step will have to iterate through all edges making really slow for…
Mohamed Taher Alrefaie
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Is it "safe" to use TitanDB?

Following the acquisition of Aurelius by DataStax, and since Titan 1.0.0 was released in September 2015 and received very few commits since then, I wonder whether it is safe to use TitanDB in production. Can anyone please give some insight?
Tony E. Stark
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What is the right way to find an edge between two vertices?

Using tinkerpop blueprints API, what is the best way to find if an edge exists between two vertices? I would like to avoid vertex.getEdges() and iterate until find the right one. E.g.: Check if v1 is friend of v2 Vertex v1 =…
Luccas
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Setup and configuration of JanusGraph for a Spark cluster and Cassandra

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…
Felix Hill
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Gremlin - how do you merge vertices to combine their properties without listing the properties explicitly?

Background: I'm trying to implement a time-series versioned DB using this approach, using gremlin (tinkerpop v3). I want to get the latest state node (in red) for a given identity node (in blue) (linked by a 'state' edge which contains a timestamp…
John Stephenson
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Why can't I connect to Gremlin-Server?

Abstract I'm trying to set up a Titan/Cassandra/Gremlin-Server stack in Docker (v1.13.0). The problem I'm facing is that applications trying to connect to Gremlin-Server on the default port 8182 are reporting errors (details below). First, here is…
Louis Thibault
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Tinkerpop3 connect to remote TitanDB server

I am trying to obtain Graph object using Tinkerpop3 in Java as client from already running TitanDB server (I do not want to create server). In other words, I am trying to implement such function: public Graph obtainGraph(String serverIp, String…
spam
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How can I delete a Vertex in Gremlin Server Titan 1.0

I'm using Titan 1.0 Version and Gremlin Server with REST Api for creating and updating Vertex details. How can I delete the vertex using vertexId?
user6323650
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How to Update the Value of Vertex in Gremlin Server ( Titan 1.0)

I'm having a vertex with following details: http://localhost:8182/?gremlin=g.V(4192) { "requestId": "6ce01f3b-f623-41f6-bb03-dd56014e0701", "status": { "message": "", "code": ​200, "attributes": { } }, "result": { "data": [ { "id":…
Sumit Chourasia
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Can't delete/remove multiple property keys on Vertex Titan 1.0 Tinkerpop 3

Very basic question, I just upgraded my Titan from 0.54 to Titan 1.0 Hadoop 1 / TP3 version 3.01. I encounter a problem with deleting values of Property key: Cardinality.LIST/SET Maybe it is due to upgrade process or just my TP3 misunderstanding. …
VitalyT
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Gremlin - Giraph - GraphX ? On TitanDb

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…
dede
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