问题与泰坦图形数据库

我想创建顶点和泰坦图形数据库的边缘（Titan1.0.0）创建顶点和边..问题与泰坦图形数据库

gremlin> graph = TitanFactory.open('titan-1.0.0-hadoop1/conf/titan-cassandra-es.properties') 

gremlin> t1 = graph.addVertex(label, "Testbed", "Name", "testbed1","Status","A","TId",101) 
==>v[1228816568] 

gremlin> r2= graph.addVertex(label, "Router", "RStatus","F","RId",1002, "TId", 101) 
==>v[3686424680] 

gremlin> t1.addEdge("tbConRtr", r2) 
==>e[kblqtz-kblsxk-d6vp-1oysvhk][1228816568-tbConRtr->3686424680]

问题：

1）为什么这里返回的顶点数是不是序列，它是一些随机数？对于addEdge步也被一些随机值（kblqtz-kblsxk-d6vp-1oysvhk）

e[kblqtz-kblsxk-d6vp-1oysvhk][1228816568-tbConRtr->3686424680]

2）我想创建边缘我TId值应该是唯一的我曾尝试以下，并得到错误信息：

gremlin> mgmt.buildIndex("TId",Vertex.class).addKey(TId).unique().buildCompositeIndex(); 
No such property: TId for class: groovysh_evaluate

我如何在Titan数据库中创建独特的属性值？

请帮我解决这个问题。

来源

2017-03-02 User12345

顶点标识和边缘标识由泰坦生成和分配。如果你想拥有自己的标识符，你应该定义一个属性并对其进行索引。

错误No such property: TId表示您正尝试使用尚未初始化的变量TId。试图索引之前，您应该定义顶点属性它

gremlin> graph = TitanFactory.open('conf/titan-cassandra-es.properties') 
==>standardtitangraph[cassandrathrift:[127.0.0.1]] 
gremlin> mgmt = graph.openManagement() 
==>com.t[email protected]4b97b3d2 
gremlin> TId = mgmt.makePropertyKey("TId").dataType(Integer.class).cardinality(Cardinality.SINGLE).make() 
==>TId 
gremlin> mgmt.buildIndex("TId",Vertex.class).addKey(TId).unique().buildCompositeIndex() 
==>TId 
gremlin> mgmt.commit() 
==>null 
gremlin> t1 = graph.addVertex(label, "Testbed", "Name", "testbed1","Status","A","TId",101) 
==>v[4200] 
gremlin> r2= graph.addVertex(label, "Router", "RStatus","F","RId",1002, "TId", 101) 
Adding this property for key [TId] and value [101] violates a uniqueness constraint [TId]

请参阅泰坦文档上schema and data modeling也indexing for better performance。

来源

2017-03-02 14:10:42

问题与泰坦图形数据库

回答

相关问题