This topic describes the parameters that Maxgraph Writer supports and how to configure it by using the code editor.

Note If you want Maxgraph Writer to write data from MaxCompute tables to Maxgraph, grant the Maxgraph build account the read permissions on the MaxCompute tables in the source MaxCompute project. Contact the Maxgraph administrator to obtain the Maxgraph build account.
To write data from MaxCompute tables to Maxgraph, you can perform the following steps to create data records and upload the data records:
  1. Create a MapReduce job to map columns in a MaxCompute table to the vertices or edges in Maxgraph. The MapReduce job converts the data records to the format that Maxgraph supports.
  2. Upload the data records that are converted by the MapReduce job to the storage of Maxgraph.

Parameters

Parameter Description Required Default value
endpoint The endpoint of Maxgraph. Yes N/A
graphName The name of the Maxgraph instance. Yes N/A
accessId The AccessKey ID of the account that you can use to connect to Maxgraph. Yes N/A
accessKey The AccessKey secret of the account that you can use to connect to Maxgraph. Yes N/A
label The label, which is the name of the vertex or edge. Yes N/A
labelType The type of the label. Valid values: vertex and edge. Yes N/A
srcLabel The label of the start vertex in an edge. This parameter takes effect only when you import data about edges. Yes N/A
dstLabel The label of the end vertex in an edge. This parameter takes effect only when you import data about edges. Yes N/A
splitSize The size of a shard in the MapReduce job. No 256MB
onlineMode The mode in which data is uploaded to the storage of Maxgraph. Valid values:
  • partition: Before an upload operation is complete, both the existing data records and the newly uploaded data records can be queried. Data consistency is kept after the synchronization ends. This mode has a fast data upload speed.
  • type: Before an upload operation is complete, only the existing data records can be queried. After the operation is complete, the new data records can be queried. This mode has a slow data upload speed.
No type
platform The name of the destination data store. Default value: odps. No odps
column The name of the vertex property. This parameter takes effect only when you import data about vertices. Yes N/A
name The name of the property. Required only when you import data about edges N/A
propertyType The type of the property. Valid values: srcPrimaryKey, dstPrimaryKey, and edgeProperty. Required only when you import data about edges N/A
srcPrimaryKey The primary key of the start vertex. This parameter takes effect only when you import data about edges. Required only when you import data about edges N/A
dstPrimaryKey The primary key of the end vertex. This parameter takes effect only when you import data about edges. Required only when you import data about edges N/A
edgeProperty The properties of the edge. This parameter can be left empty if the edge has no properties. No N/A

Configure Maxgraph Writer by using the code editor

You can configure Maxgraph Writer by using the code editor. For more information, see Create a sync node by using the code editor.

The following examples show how to configure sync nodes to write data about vertices and edges to Maxgraph.
  • Configure a sync node to write data about vertices to Maxgraph 
    {
  "job": {
    "setting": {
      "speed": {
        "channel": 1 // Set the value to 1.
      },
      "errorLimit": {
        "record": 1000
      }
    },
    "content": [
      {
        "reader": {
          "name": "odpsreader",
          "parameter": {
            "accessId": "*****",
            "accessKey": "*****",
            "project": "maxgraph_dev",
            "table": "maxgraph_demo_person",
            "column": [ // The names of columns in the table in MaxCompute. The value of this parameter has a one-to-one mapping with the value of the column parameter of Maxgraph Writer.
              "id",
              "name",
              "age"
            ],
            "packageAuthorizedProject": "biggraph_dev",
            "splitMode": "record",
            "odpsServer": "******"
          }
        },
        "writer": {
          "name": "maxgraphwriter",
          "parameter": {
            "endpoint": "http://graph.alibaba.net",
            "graphName": "xxx",
            "accessId": "xxx",
            "accessKey": "xxx",
            "label": "person",
            "labelType": "vertex",
            "onlineMode": "partition",
            "platform": "odps",
            "splitSize": "256",
            "column": [ // The names of vertex properties in Maxgraph. The value of this parameter has a one-to-one mapping with the value of the column parameter of MaxCompute Reader.
              "id",
              "name",
              "age"
            ]
          }
        }
      }
    ]
  }
}
  • Configure a sync node to write data about edges to Maxgraph 
    {
  "job": {
    "setting": {
      "speed": {
        "channel": 1 // Set the value to 1.
      },
      "errorLimit": {
        "record": 1000
      }
    },
    "content": [
      {
        "reader": {
          "name": "odpsreader",
          "parameter": {
            "accessId": "*****",
            "accessKey": "*****",
            "project": "maxgraph_dev",
            "table": "maxgraph_demo_knows",
            "column": [
              "person_id",
              "person_id2",
              "weight",
              "id"
            ],
            "packageAuthorizedProject": "biggraph_dev",
            "splitMode": "record",
            "odpsServer": "****"
          }
        },
        "writer": {
          "name": "maxgraphwriter",
          "parameter": {
            "endpoint": "http://graph.alibaba.net",
            "graphName": "xxx",
            "accessId": "xxx",
            "accessKey": "xxx",
            "label": "knows",
            "labelType": "edge",
            "srcLabel": "person",
            "dstLabel": "person",
            "onlineMode": "partition",
            "platform": "odps",
            "splitSize": "256",
            "column": [ 
              {
                "name": "id", // The name of the edge property in Maxgraph.
                "propertyType": "srcPrimaryKey" // The type of the edge property in Maxgraph. This parameter specifies whether a data record is the start vertex, end vertex, or a property of an edge.
              },
              {
                "name": "id",
                "propertyType": "dstPrimaryKey"
              },
              {
                "name": "weight",
                "propertyType": "edgeProperty"
              },
              {
                "name": "id",
                "propertyType": "edgeProperty"
              }
            ]
          }
        }
      }
    ]
  }
}