titan Questions
2
Solved
I'm new to this and am trying to get Titan working with Python. I've been beating my head on this for a day and a half and can't get anywhere. I've tried bulbs and rexpro-python but nothing seems t...
2
Solved
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 du...
Hanako asked 11/4, 2016 at 13:7
2
Solved
In my system I have the requirement that the number of edges on the node must be stored as an internal property on the vertex as well as a vertex centric index on a specific outgoing edge. This nat...
2
I'm unable to create an index. My Gremlin code is as follows:
usernameProperty = mgmt.getPropertyKey('username')
usernameIndex = mgmt.buildIndex('byUsernameUnique', Vertex.class).addKey(usernamePr...
Appetizer asked 26/2, 2016 at 16:11
1
Solved
Im trying to query a titan db 0.5.4 via mogwai, but when I run the following script i get the error: rexpro.exceptions.RexProScriptException: transaction is not open
and I found the same question ...
Greenebaum asked 10/2, 2016 at 18:23
1
Solved
I want to remove edge between two vertices, so my code in java tinkerpop3 as below
private void removeEdgeOfTwoVertices(Vertex fromV, Vertex toV,String edgeLabel,GraphTraversalSource g){
if(g.V(t...
Llanes asked 4/1, 2016 at 10:36
1
Solved
The Titan documentation says that:
Mixed indexes support ordering natively and efficiently. However, the property key used in the order().by() method must have been previously added to the mixed...
Anecdotist asked 15/12, 2015 at 9:8
1
Solved
I'm currently reading the TinkerPop3 Documentation
What I'm confused is that I can't find any explanation about next().
For example, w/ next() or w/o next() returns same vertext
gremlin> g.V(...
Chlorinate asked 1/12, 2015 at 9:22
1
The examples from the tutorials or the online documentations often use the Gremlin/Groovy shell to demonstrate the TitanDB APIs.
I'm working in plain (old, but not so old) Java-8, and the first th...
1
Solved
I spent a week at Gremlin shell trying to compose one query to
get all incoming and outgoing vertexes, including their edges and directions. All i tried everything.
g.V("name","testname").bothE.as...
2
Solved
I am trying to set up a completely basic Titan Rexster Cassandra instance, but I can't seem to break the code. I have tried a whole lot of things now to get it to work but I just can't seem to get ...
1
Solved
I want to query my TITAN 0.4 graph, based on two filter conditions with "OR" logical operator (return vertices if either of conditions is true).
I searched this on http://sql2gremlin.com/, but onl...
Quenchless asked 5/5, 2015 at 3:26
2
Solved
In the O'Reilly book "Graph Databases" in chapter 6, which is about how Neo4j stores a graph database it says:
To understand why native graph processing is so much more efficient
than graphs ba...
Ungovernable asked 24/9, 2014 at 5:19
1
Solved
I need to learn Gremlin etc. and possibly use it within a public facing production-ready system I'm working on. As any release of my system is, at a minimum, 6 months away (say end Q1 2015), ...
1
Solved
I've been looking at the management system but some things still elude me. Essentially what I want to do is:
List all Edge based indexes (including vertex centric).
List all Vertex based indexes ...
2
Can anybody please provide or point out to a good comparison between Neo4j and Titan?
One thing i can see is in terms of scale - Titan is scaleout and requires an underlying scalable datasto...
Gimcrackery asked 24/6, 2013 at 6:34
2
Solved
I'm using Titan with Cassandra and have several (related) questions about querying the database with Gremlin:
1.) Is there an faster way to count all vertices than
g.V.count()
Titan claims to u...
1
Solved
I'm looking at using Titan to create a scalable geospatial data store (I'm thinking R trees). In the documentation, there is a GeoShape query, and the docs say that titan can do geo data with Lucen...
3
Solved
I'm just getting into graph databases, and I seem to keep running into a problem deciding between using an "index node" or an "indexed property" for tracking things like "node type". Since I've no ...
Giovannagiovanni asked 5/10, 2012 at 22:1
3
Solved
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 i...
Shaffert asked 27/1, 2014 at 9:30
1
Solved
Is there anyway to query on date in titan/gremlin?
e.g. find all results in the last X days
Any help would be much appreciated.
3
Solved
I've been playing with Titan graph server for a while now. And my feeling is that, despite an extensive documentation, there is a lack of Getting started from scratch tutorial.
My final goal is to...
Chitwood asked 6/5, 2013 at 11:5
2
Is there a way to create a unique edge between two vertices on a Titan graph and confirm it can't be created again, unless deleted and recreated?
Basically I need to create:
vertex1--follows-->...
2
Solved
I am using Titan v0.3.1 and would like to see a list of which keys I have already indexed via createKeyIndex. How can I do this?
2
Solved
If someone builds a database on top of another database, such as twitter has done, does that database inherit the limitations and inefficiencies of the underlying database?
I'm specifically intere...
Campion asked 23/7, 2013 at 13:23
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