titan 如何删除JanusGraph索引？ 返回

如何删除JanusGraph索引？


荧惑
2025-03-15 07:47:24 (24天前)


但是已经安装了索引状态，如何将状态更改为已注册然后禁用它以将其删除请帮助我，

GraphTraversalSource g = janusGraph.traversal（）;
JanusGraphManagement …

3 条回复
  1. 0# 早岁那知世事艰 | 2019-08-31 10-32



    如果您无法将索引的状态从Install更改为Enable，我建议您检查JanusGraph的运行实例并关闭除“（Current）”之外的所有实例，然后再次尝试删除索引。



    要检查和关闭实例，请在gremlin shell中使用以下命令：



    1.     
            mgmt = graph.openManagement()
    2. mgmt.getOpenInstances() //all open instances
    3. ==>7f0001016161-dunwich1(current)
      ==>7f0001016161-atlantis1
    4. mgmt.forceCloseInstance(‘7f0001016161-atlantis1’) //remove an instance
      mgmt.commit()
    5. </code>
    6.


    要删除索引，请使用以下代码：



    1.     
            // Disable the “name” composite index
      this.management = this.graph.openManagement()
      def nameIndex = this.management.getGraphIndex(indexName)
      this.management.updateIndex(nameIndex, SchemaAction.DISABLE_INDEX).get()
      this.management.commit()
      this.graph.tx().commit()
    2. // Block until the SchemaStatus transitions from INSTALLED to REGISTERED
      ManagementSystem.awaitGraphIndexStatus(graph, indexName).status(SchemaStatus.DISABLED).call()
    3. // Delete the index using JanusGraphManagement
      this.management = this.graph.openManagement()
      def delIndex = this.management.getGraphIndex(indexName)
      def future = this.management.updateIndex(delIndex, SchemaAction.REMOVE_INDEX)
      this.management.commit()
      this.graph.tx().commit()
    4. </code>
    5.


    我遇到了同样的问题并尝试了很多其他的事情，最后上面的程序工作了！


  2. 1# 薄情 | 2019-08-31 10-32



    的
    您必须先禁用索引，然后才能将其删除。
    </强>



    1.     
            // Disable the “phoneIndex” composite index
      janusGraphManagement = janusGraph.openManagement()
      phoneIndex = janusGraphManagement.getGraphIndex(‘phoneIndex’)
      janusGraphManagement.updateIndex(phoneIndex, SchemaAction.DISABLE_INDEX).get()
      janusGraphManagement.commit()
      janusGraph.tx().commit()
    2. // Block until the SchemaStatus transitions from INSTALLED to REGISTERED
      ManagementSystem.awaitGraphIndexStatus(janusGraph, ‘phoneIndex’).status(SchemaStatus.DISABLED).call()
    3. // Delete the index using TitanManagement
      janusGraphManagement = janusGraph.openManagement()
      phoneIndex = janusGraphManagement.getGraphIndex(‘phoneIndex’)
      future = janusGraphManagement.updateIndex(phoneIndex, SchemaAction.REMOVE_INDEX)
      janusGraphManagement.commit()
      janusGraph.tx().commit()
    4. </code>
    5.

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