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Community Blog Use Dataworks with Python3 to Import Data from MaxCompute to Neo4j

Use Dataworks with Python3 to Import Data from MaxCompute to Neo4j

This article describes how to use Dataworks with Python3 to import data from MaxCompute to Neo4j

By Haoran Wang, Sr. Big Data Solution Architect of Alibaba Cloud

1. Install Neo4j Community Version on Windows

Check Windows Installation documents

https://neo4j.com/docs/operations-manual/current/installation/windows/

Check System Requirement

1

Install Oracle JDK 17

https://www.oracle.com/java/technologies/downloads/#jdk17-windows

Get Download link of neo4j community

https://neo4j.com/download-center/#community

2

Check the neo4j command parameters

3

Install as Windows-service

4

Start the Service

5

Open a web explorer to access http://localhost:7474

6

Connect database

Input neo4j for both Username and Password, keep empty for database, then click connect. And change your password at the first time.

7

Test Cypher query command

After login successfully, you can see the following screenshot. Please note, for community version, you have only two database, one is sytem, one is neo4j. so it will use neo4j by default, and all the objects are in this database.

8

2. Enable Remote Access for Neo4j

Find out the .conf file

9

Find out the .conf file

Uncomment the configuration and add 0.0.0.0 for remote access. And bolt is used for spark scala.

10

Restart the service to take effect.

11

3. Confirm the LAN IP from ECS

Check LAN IP for ECS, eg. 192.169.0.200

12

Enable 7474 and 7687 from security group

13
14

4. Use PIP to Import Neo4j Python Drivers Library

Purpose Exclusive Resource Group for Scheduling

15

Find out the Resource Group and click O&M Assistant

16

Click Create Command

17
18

/home/tops/bin/pip3 install neo4j

Then Create and then Run

19

After it is running successfully, the driver is imported.

5. Configure Exclusive Resource Group for Same VPC access

Find out the Network Settings of your new resource group.

20

Choose the correct VPC, VSwitch, Security group, which is in the same VPC settings with your ECS.

21

6. Start to Use PySpark to Import Data

Method1 – Use Python

Run following sql in DW to create tables to initialize the data

--odps sql 
--********************************************************************--
--author:pingjingwhr@test.aliyunid.com
--create time:2023-01-17 16:57:12
--********************************************************************--

CREATE TABLE ods_user
(
    user_id STRING,
    is_ekyc INT,
    balance DOUBLE
);

INSERT INTO TABLE ods_user VALUES ('user1',1,30.7);
INSERT INTO TABLE ods_user VALUES ('user2',1,0);
INSERT INTO TABLE ods_user VALUES ('user3',0,222.23);
INSERT INTO TABLE ods_user VALUES ('user4',1,433.7);

CREATE TABLE ods_credit_card
(
    user_card_id STRING
);

INSERT INTO TABLE ods_credit_card VALUES ('cc1');
INSERT INTO TABLE ods_credit_card VALUES ('cc2');
INSERT INTO TABLE ods_credit_card VALUES ('cc3');
INSERT INTO TABLE ods_credit_card VALUES ('cc4');

CREATE TABLE ods_p2p
(
    p2p_id STRING,
    amount DOUBLE
);

INSERT INTO TABLE ods_p2p VALUES ('p2p1',42);
INSERT INTO TABLE ods_p2p VALUES ('p2p2',572);
INSERT INTO TABLE ods_p2p VALUES ('p2p3',887);

drop table ods_user_cc_rel;
CREATE TABLE ods_user_cc_rel
(
    user_id STRING,
    user_card_id STRING
);

INSERT INTO TABLE ods_user_cc_rel VALUES ('user1','cc1');
INSERT INTO TABLE ods_user_cc_rel VALUES ('user2','cc2');
INSERT INTO TABLE ods_user_cc_rel VALUES ('user3','cc3');
INSERT INTO TABLE ods_user_cc_rel VALUES ('user1','cc4');
INSERT INTO TABLE ods_user_cc_rel VALUES ('user1','cc2');

CREATE TABLE ods_user_p2p_receive_rel
(
    user_id STRING,
    p2p_id STRING
);

INSERT INTO TABLE ods_user_p2p_receive_rel VALUES ('user2','p2p1');
INSERT INTO TABLE ods_user_p2p_receive_rel VALUES ('user2','p2p2');
INSERT INTO TABLE ods_user_p2p_receive_rel VALUES ('user3','p2p3');

CREATE TABLE ods_user_p2p_transfer_rel
(
    user_id STRING,
    p2p_id STRING
);

INSERT INTO TABLE ods_user_p2p_transfer_rel VALUES ('user1','p2p1');
INSERT INTO TABLE ods_user_p2p_transfer_rel VALUES ('user3','p2p2');
INSERT INTO TABLE ods_user_p2p_transfer_rel VALUES ('user4','p2p3');

Create PyODPS3 node

22

Copy the following query

You need to change the URI and Auth based on the above method to get the public IP and your new password

#import Aliyun ODPS library
from odps.df import DataFrame
from odps.df import output

#import neo4j library
from neo4j import GraphDatabase

#unlimit 10,000 rows limitation
options.tunnel.use_instance_tunnel = True
options.tunnel.limit_instance_tunnel = False  # Remove the limit restriction and read all the data.

#start
print('demo1: start')

URI = "bolt://192.168.0.200:7687"
AUTH = ("neo4j", "Password01!")

#define functions for Cypher command
def create_user(tx, user_id, is_ekyc, balance):
    tx.run("CREATE (u:User {user_id: $user_id, is_ekyc: $is_ekyc, balance: $balance})",
    user_id = user_id, is_ekyc = is_ekyc, balance = balance)

def create_cc(tx, user_card_id):
    tx.run("CREATE (u:CC {user_card_id: $user_card_id})",
    user_card_id = user_card_id)

def create_p2p(tx, p2p_id, amount):
    tx.run("CREATE (p:p2p {p2p_id: $p2p_id, amount: $amount})",
    p2p_id = p2p_id, amount = amount)

def create_rel_transfer(tx, user_id, p2p_id):
    tx.run(
        """
        MATCH (a:User), (b:p2p)
        WHERE a.user_id = $user_id AND b.p2p_id = $p2p_id
        CREATE (a)-[r:P2P_TRANSFER]->(b)
        """,
        user_id = user_id, p2p_id = p2p_id
        )
        
def create_rel_receive(tx, user_id, p2p_id):
    tx.run(
        """
        MATCH (a:User), (b:p2p)
        WHERE a.user_id = $user_id AND b.p2p_id = $p2p_id
        CREATE (b)-[r:P2P_RECEIVE]->(a)
        """,
        user_id = user_id, p2p_id = p2p_id
        )

def create_rel_user_cc(tx, user_id, user_card_id):
    tx.run(
        """
        MATCH (a:User), (b:CC)
        WHERE a.user_id = $user_id AND b.user_card_id = $user_card_id
        CREATE (a)-[r:HAS_CC]->(b)
        """,
        user_id = user_id, user_card_id = user_card_id
        )

with GraphDatabase.driver(URI, auth=AUTH) as driver:
    with driver.session(database="neo4j") as session:

        #start to import data from ods_user
        with o.execute_sql('select * from ods_user').open_reader() as reader:
            for record in reader:   
                session.execute_write(create_user, user_id = record[0], is_ekyc = record[1], balance = record[2])        
        print('Node User completes')

        #start to import data from ods_credit_card
        with o.execute_sql('select * from ods_credit_card').open_reader() as reader:
            for record in reader:   
                session.execute_write(create_cc, user_card_id = record[0])
        print('Node CC completes')

        #start to import data from ods_user
        with o.execute_sql('select * from ods_p2p').open_reader() as reader:
            for record in reader:   
                session.execute_write(create_p2p, p2p_id = record[0], amount = record[1])
        print('Node p2p completes')

        #start to import relationship from ods_user_p2p_transfer_rel
        with o.execute_sql('select * from ods_user_p2p_transfer_rel').open_reader() as reader:
            for record in reader:   
                session.execute_write(create_rel_transfer, user_id = record[0], p2p_id = record[1])
        print('Relationship TRANSFER completes')
        
        #start to import relationship from ods_user_p2p_receive_rel
        with o.execute_sql('select * from ods_user_p2p_receive_rel').open_reader() as reader:
            for record in reader:   
                session.execute_write(create_rel_receive, user_id = record[0], p2p_id = record[1])
        print('Relationship RECEIVE completes')
        
        #start to import relationship from ods_user_p2p_receive_rel
        with o.execute_sql('select * from ods_user_cc_rel').open_reader() as reader:
            for record in reader:   
                session.execute_write(create_rel_user_cc, user_id = record[0], user_card_id = record[1])
        print('Relationship HAS_CC completes')
        
print('end of demo')

Make sure you choose the right resource group to run it. You must use the exclusive resource group which you use PIP installing the driver library.

23

You can also have a schedule based on the configuration of dataworks

24

Method2 – Use PySpark

1) Run following sql in DW to create tables to initialize the data

--odps sql 
--********************************************************************--
--author:pingjingwhr@test.aliyunid.com
--create time:2023-01-17 16:57:12
--********************************************************************--

CREATE TABLE ods_user
(
    user_id STRING,
    is_ekyc INT,
    balance DOUBLE
);

INSERT INTO TABLE ods_user VALUES ('user1',1,30.7);
INSERT INTO TABLE ods_user VALUES ('user2',1,0);
INSERT INTO TABLE ods_user VALUES ('user3',0,222.23);
INSERT INTO TABLE ods_user VALUES ('user4',1,433.7);

CREATE TABLE ods_credit_card
(
    user_card_id STRING
);

INSERT INTO TABLE ods_credit_card VALUES ('cc1');
INSERT INTO TABLE ods_credit_card VALUES ('cc2');
INSERT INTO TABLE ods_credit_card VALUES ('cc3');
INSERT INTO TABLE ods_credit_card VALUES ('cc4');

CREATE TABLE ods_p2p
(
    p2p_id STRING,
    amount DOUBLE
);

INSERT INTO TABLE ods_p2p VALUES ('p2p1',42);
INSERT INTO TABLE ods_p2p VALUES ('p2p2',572);
INSERT INTO TABLE ods_p2p VALUES ('p2p3',887);

drop table ods_user_cc_rel;
CREATE TABLE ods_user_cc_rel
(
    user_id STRING,
    user_card_id STRING
);

INSERT INTO TABLE ods_user_cc_rel VALUES ('user1','cc1');
INSERT INTO TABLE ods_user_cc_rel VALUES ('user2','cc2');
INSERT INTO TABLE ods_user_cc_rel VALUES ('user3','cc3');
INSERT INTO TABLE ods_user_cc_rel VALUES ('user1','cc4');
INSERT INTO TABLE ods_user_cc_rel VALUES ('user1','cc2');

CREATE TABLE ods_user_p2p_receive_rel
(
    user_id STRING,
    p2p_id STRING
);

INSERT INTO TABLE ods_user_p2p_receive_rel VALUES ('user2','p2p1');
INSERT INTO TABLE ods_user_p2p_receive_rel VALUES ('user2','p2p2');
INSERT INTO TABLE ods_user_p2p_receive_rel VALUES ('user3','p2p3');

CREATE TABLE ods_user_p2p_transfer_rel
(
    user_id STRING,
    p2p_id STRING
);

INSERT INTO TABLE ods_user_p2p_transfer_rel VALUES ('user1','p2p1');
INSERT INTO TABLE ods_user_p2p_transfer_rel VALUES ('user3','p2p2');
INSERT INTO TABLE ods_user_p2p_transfer_rel VALUES ('user4','p2p3');

2) Create Python as a Resource

25

3) Copy the following query

You need to change the URI and Auth based on the above method to get the internal IP and your new password

# -*- coding: utf-8 -*-
import sys
from pyspark.sql import SparkSession

try:
    # for python 2
    reload(sys)
    sys.setdefaultencoding('utf8')
except:
    # python 3 not needed
    pass

if __name__ == '__main__':
    spark = SparkSession.builder\
        .appName("spark sql")\
        .config("spark.sql.broadcastTimeout", 20 * 60)\
        .config("spark.sql.crossJoin.enabled", True)\
        .config("odps.exec.dynamic.partition.mode", "nonstrict")\
        .getOrCreate()

    # read table
    rdf1 = spark.sql("select user_id, is_ekyc, balance from ods_user")

    rdf1.write.format("org.neo4j.spark.DataSource") \
        .mode("OverWrite") \
        .option("authentication.basic.username", "neo4j") \
        .option("authentication.basic.password", "Password01!") \
        .option("url", "bolt://192.168.0.200:7687") \
        .option("labels", ":User") \
        .option("node.keys", "user_id") \
        .save()

    rdf2 = spark.sql("select p2p_id, amount from ods_p2p")

    rdf2.write.format("org.neo4j.spark.DataSource") \
        .mode("OverWrite") \
        .option("authentication.basic.username", "neo4j") \
        .option("authentication.basic.password", "Password01!") \
        .option("url", "bolt://192.168.0.200:7687") \
        .option("labels", ":P2P") \
        .option("node.keys", "p2p_id") \
        .save()

    rdf3 = spark.sql("select user_card_id from ods_credit_card")

    rdf3.write.format("org.neo4j.spark.DataSource") \
        .mode("OverWrite") \
        .option("authentication.basic.username", "neo4j") \
        .option("authentication.basic.password", "Password01!") \
        .option("url", "bolt://192.168.0.200:7687") \
        .option("labels", ":CC") \
        .option("node.keys", "user_card_id") \
        .save()
    
    rdf4 = spark.sql("select user_id, p2p_id from ods_user_p2p_transfer_rel")

    rdf4.write.format("org.neo4j.spark.DataSource") \
        .option("authentication.basic.username", "neo4j") \
        .option("authentication.basic.password", "Password01!") \
        .option("url", "bolt://192.168.0.200:7687") \
        .option("relationship", "TRANSFER") \
        .option("relationship.save.strategy", "keys") \
        .option("relationship.source.labels", ":User") \
        .option("relationship.source.save.mode", "overwrite") \
        .option("relationship.source.node.keys", "user_id:user_id") \
        .option("relationship.target.labels", ":P2P") \
        .option("relationship.target.node.keys", "p2p_id:p2p_id") \
        .option("relationship.target.save.mode", "overwrite") \
        .save()

    rdf5 = spark.sql("select user_id, p2p_id from ods_user_p2p_receive_rel")

    rdf5.write.format("org.neo4j.spark.DataSource") \
        .option("authentication.basic.username", "neo4j") \
        .option("authentication.basic.password", "Password01!") \
        .option("url", "bolt://192.168.0.200:7687") \
        .option("relationship", "RECEIVE") \
        .option("relationship.save.strategy", "keys") \
        .option("relationship.source.labels", ":P2P") \
        .option("relationship.source.save.mode", "overwrite") \
        .option("relationship.source.node.keys", "p2p_id:p2p_id") \
        .option("relationship.target.labels", ":User") \
        .option("relationship.target.node.keys", "user_id:user_id") \
        .option("relationship.target.save.mode", "overwrite") \
        .save()

    rdf6 = spark.sql("select user_id, user_card_id from ods_user_cc_rel")

    rdf6.write.format("org.neo4j.spark.DataSource") \
        .option("authentication.basic.username", "neo4j") \
        .option("authentication.basic.password", "Password01!") \
        .option("url", "bolt://192.168.0.200:7687") \
        .option("relationship", "HAS") \
        .option("relationship.save.strategy", "keys") \
        .option("relationship.source.labels", ":User") \
        .option("relationship.source.save.mode", "overwrite") \
        .option("relationship.source.node.keys", "user_id:user_id") \
        .option("relationship.target.labels", ":CC") \
        .option("relationship.target.node.keys", "user_card_id:user_card_id") \
        .option("relationship.target.save.mode", "overwrite") \
        .save()

4) Submit & Deploy the py as a resource.

26
27

5) Import neo4j Connector Jar as a file resource

Download neo4j Connector:

https://github.com/neo4j-contrib/neo4j-spark-connector/releases/download/4.1.5/neo4j-connector-apache-spark_2.11-4.1.5_for_spark_2.4.jar

28

https://neo4j.com/docs/spark/current/quickstart/
https://neo4j.com/docs/spark/current/overview/#_spark_compatibility

29
30
31

6) Create a Node with type “ODPS Spark”

32

33

  • Choose Spark 2.x
  • Choose Python
  • Choose the python file you write, eg. pySpark2Neo4j.py
  • Choose the connector jar from File Resource
  • Add Configuration item to specify the spark version with 2.4.5
spark.hadoop.odps.spark.version=spark-2.4.5-odps0.33.0

34
https://www.alibabacloud.com/help/en/maxcompute/latest/set-up-a-spark-on-maxcompute-development-environment

  • Add Configuration item to make it access to ECS
spark.hadoop.odps.cupid.vpc.domain.list=…

The configuration for domain list is a one line json file.

{
  "regionId":"ap-southeast-3",
  "vpcs":[
    {
      "vpcId":"vpc-uf6bypg1XXXX",
      "zones":[
        {
          "urls":[
            {
              "domain":"192.168.0.200",
              "port": 7687
            }
          ]
        }
      ]
    }
  ]
}

You need to change the vpcid and domain info, domain ip is the ECS internal IP which has neo4j instance.

After that, use notepad++ to remove n to generate the json as one line, and put it into parameter.

35

https://www.alibabacloud.com/help/en/maxcompute/latest/access-instances-in-a-vpc-from-spark-on-maxcompute

Then click submit and smoke test

36
37

From the resource group, use the exclusive resource group which is in the same VPC

The success log looks like this one.

38

7. Check Result for Neo4j

You can use Cypher to check the result now.

39

8. Stress Test with 1,500,000 Nodes

Run the following command directly, it will load public data into your user tables, it has 1.5M data.

INSERT INTO TABLE ods_user
SELECT c_custkey, 1, DOUBLE(c_acctbal) from MAXCOMPUTE_PUBLIC_DATA.odps_customer_10g;

Then rerun the job, to check the performance result.

Based on the test, the import speed is 10,000 nodes/minute.

Reference

-- to quickly clean all data
MATCH (n) DETACH DELETE n

--to quickly check all nodes
MATCH (n) RETURN n

--to quickly check the relationship
MATCH (n1)-[r]->(n2) RETURN r, n1, n2 LIMIT 25

How to Configure Python3.7

40
https://www.alibabacloud.com/help/en/maxcompute/latest/develop-a-spark-on-maxcompute-application-by-using-pyspark

Python MaxCompute Big Data DataWorks Tutorials Neo4j
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