How to make schema less titan graph?How to set schema-default property?

Question

How to make schema less titan graph?How to set schema-default propery ? Please suggest a way?Here is my code :

try{
//timestamp,1416375283,ipaddress,2097152002,mobilenumber,966566564213,eventname,1000


    // TODO Auto-generated method stub


    FileInputStream fstream = new FileInputStream("/root/edges_sorted.txt");
    DataInputStream in = new DataInputStream(fstream);
    BufferedReader br = new BufferedReader(new InputStreamReader(in));
    String csv = "/root/log.CSV";
    FileWriter writer = new FileWriter(csv);
    Configuration conf = new BaseConfiguration();
    conf.setProperty("storage.backend","hbase");
    conf.setProperty("storage.hostname","192.168.51.98");
    conf.setProperty("storage.batch-loading","true");
    conf.setProperty("storage.batch-loading",true);
    conf.setProperty("storage.buffer-size",3024000);
    conf.setProperty("storage.tablename",graphName);
    conf.setProperty("ids.block-size", 1000000);
    conf.setProperty("ids.flush ", true);
    //set the db cache
    conf.setProperty("cache.db-cache",true);
    //set the cache size
    conf.setProperty("cache.db-cache-size",0.5);
    conf.setProperty("storage.hbase.region-count",3);
    conf.setProperty("storage.hbase.skip-schema-check", false);
    conf.setProperty("storage.index.titan5.backend","elasticsearch");
    conf.setProperty("storage.index.titan5.hostname", "192.168.51.95");
    conf.setProperty("storage.index.titan5.client-only", false);
    conf.setProperty("storage.index.titan5.cluster-name","titancluster");
    conf.setProperty("storage.index.titan5.index-name", indexName);
    conf.setProperty("graph.set-vertex-id",true);

        conf.setProperty("attributes.allow-all",true);
    conf.setProperty("schema.default",false);
    TitanGraph titanGraph = TitanFactory.open(conf);


    titanGraph.makeLabel("reason").manyToMany().make();
    titanGraph.makeLabel("many").manyToMany().make();
    BatchGraph<TitanGraph> titanBatchGraph=new BatchGraph<TitanGraph>(titanGraph,VertexIDType.NUMBER,batchsize);

    titanBatchGraph.setLoadingFromScratch(true);
    String locations[]=CreateDummy1.getCircleList();
    String strLine1="";
    int circleindex=0;
    int count=0;

    Vertex vertex;
    Vertex vertex2;

        count ++;
        if(circleindex==locations.length)
            circleindex=0;



        vertex=titanBatchGraph.getVertex(1);
        if(vertex==null){
             vertex = titanBatchGraph.addVertex(1);
            vertex.setProperty("n",1);
            vertex.setProperty("a",100);
        }

        vertex2=titanBatchGraph.getVertex(2);
        if(vertex2==null){
count++;
vertex2 = titanBatchGraph.addVertex(2);
vertex2.setProperty("n",2);
vertex2.setProperty("a", 10000);
        }

        Edge edge= titanBatchGraph.addEdge(1,vertex,vertex2,"reason");
        edge.setProperty("ti",1);
        edge.setProperty("s", 5);

        //second edge
        vertex=titanBatchGraph.getVertex(1);
        if(vertex==null){
             vertex = titanBatchGraph.addVertex(1);
            vertex.setProperty("n",1);
            vertex.setProperty("a",100);
        }
        else
        {
            vertex.setProperty("n1", 45);
        }

        vertex2=titanBatchGraph.getVertex(2);
        if(vertex2==null){
count++;
vertex2 = titanBatchGraph.addVertex(2);
vertex2.setProperty("n",2);
vertex2.setProperty("a", 10000);
        }

        Edge edge1= titanBatchGraph.addEdge(2,vertex,vertex2,"reason");
        edge1.setProperty("ti",2);
        edge1.setProperty("s",6);
        titanBatchGraph.commit();      
        titanBatchGraph.shutdown();

                }
    catch(Exception e)
    {
        e.printStackTrace();
    }
    }

How to set scheme-default configuration? how to set it to default so that automatic schemas are generated?Please suggest a way or any alternative ?

Answer 1

Titan is set in that configuration by default. To elaborate, this settings schema.default is set to blueprints automatically. To force schema definition, you need to set that value to none. The docs read:

Configures the DefaultSchemaMaker to be used by this graph. If set to none, automatic schema creation is disabled. Defaults to a blueprints compatible schema maker with MULTI edge labels and SINGLE property keys

To enforce a schema you need to do this:

conf.setProperty("schema.default","none");

and to use the "default" schema creation system you should do:

conf.setProperty("schema.default","blueprints");

All that said, it is generally a bad idea to allow Titan to create the schema for anything except very simple cases. If you don't provide Titan a schema, you will lose many optimizations and features that Titan provides and therefore you performance may not be as good as it possible could be.