Migrating data from Yandex Managed Service for MySQL® to Yandex Managed Service for Greenplum® using Yandex Data Transfer

You can set up data transfer from Managed Service for MySQL® to Managed Service for Greenplum® databases using Data Transfer. To do this:

1. Prepare the test data.
2. Create a database in the target cluster.
3. Prepare and activate your transfer.
4. Test the transfer.

If you no longer need the resources you created, delete them.

Required paid resourcesRequired paid resources

The support cost includes:

• Managed Service for MySQL® cluster fee: Using computing resources allocated to hosts and disk space (see Managed Service for MySQL® pricing).
• Managed Service for Greenplum® cluster fee: Using computing resources allocated to hosts and disk space (see Managed Service for Greenplum® pricing).
• Fee for using public IP addresses for cluster hosts (see Virtual Private Cloud pricing).
• Per-transfer fee: Using computing resources and the number of transferred data rows (see Data Transfer pricing).

Getting startedGetting started

Set up your infrastructure:

Prepare the test dataPrepare the test data

1. Connect to the mmy_db database in the Managed Service for MySQL® source cluster.

2. Create a simple table named table1:

   CREATE TABLE table1 (
   id int NOT NULL,
   name varchar (10),
   PRIMARY KEY (id)
   );
   

3. Populate the table with data:

   INSERT INTO table1 VALUES
   (1, 'Name1'),
   (2, 'Name2'),
   (3, 'Name3');
   

Create a database in the target clusterCreate a database in the target cluster

1. Connect to the auxiliary postgres database in the Managed Service for Greenplum® target cluster as mgp_user.

2. Create a database named mgp_db:

   CREATE DATABASE mgp_db;
   

Prepare and activate your transferPrepare and activate your transfer

1. Create a target endpoint of the Greenplum® type and specify the cluster connection settings in it:

   • Connection type: Managed Service for Greenplum cluster.
   • Managed Service for Greenplum cluster: <name_of_Greenplum®_target_cluster> from the drop-down list.
   • Database: mgp_db.
   • User: mgp_user.
   • Password: <user_password>.

2. Create a source endpoint and transfer.

   Manually

   Using Terraform

   1. Create a source endpoint of the MySQL® type and specify these cluster connection settings in it:

      • Connection type: Managed Service for MySQL cluster.
      • Managed Service for MySQL cluster: <name_of_MySQL®_source_cluster> from the drop-down list.
      • Database: mmy_db.
      • User: mmy_user.
      • Password: <user_password>.

   2. Create a transfer of the Snapshot and replication type that will use the created endpoints.

   3. Activate the transfer and wait for its status to change to Replicating.

   1. In the mmy-to-mgp.tf file, specify the following settings:

      • target_endpoint_id: Target endpoint ID.
      • transfer_enabled: 1 to create a transfer.

   2. Make sure the Terraform configuration files are correct using this command:

      terraform validate
      

      If there are any errors in the configuration files, Terraform will point them out.

   3. Create the required infrastructure:

      1. Run this command to view the planned changes:

         terraform plan
         

         If you described the configuration correctly, the terminal will display a list of the resources to update and their parameters. This is a verification step that does not apply changes to your resources.

      2. If everything looks correct, apply the changes:

         1. Run this command:

            terraform apply
            

         2. Confirm updating the resources.

         3. Wait for the operation to complete.

   4. The transfer will be activated automatically. Wait for its status to change to Replicating.

Test the transferTest the transfer

Check the transfer performance by testing the copy and replication processes.

Test the copy processTest the copy process

1. Connect to mgp_db in the Managed Service for Greenplum® target cluster.

2. Run this request:

   SELECT * FROM mmy_db.table1;
   

Test the replication processTest the replication process

1. Connect to the mmy_db database in the Managed Service for MySQL® source cluster.

2. Populate the table1 table with data:

   INSERT INTO table1 VALUES
   (4, 'Name4');
   

3. Make sure the new row has been added to the target database:

   1. Connect to mgp_db in the Managed Service for Greenplum® target cluster.

   2. Run this request:

      SELECT * FROM mmy_db.table1;
      

Delete the resources you createdDelete the resources you created

Some resources are not free of charge. To avoid paying for them, delete the resources you no longer need: