Migrating data from Managed Service for MySQL® to Yandex MPP Analytics for PostgreSQL using Yandex Data Transfer

You can set up a data transfer from Managed Service for MySQL® to Greenplum® databases in Yandex MPP Analytics for PostgreSQL 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 your transfer.

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

Required paid resourcesRequired paid resources

• Managed Service for MySQL® cluster: computing resources allocated to hosts, size of storage and backups (see Managed Service for MySQL® pricing).
• Greenplum® cluster: computing resources allocated to hosts, size of storage and backups (see Yandex MPP Analytics for PostgreSQL pricing).
• Public IP addresses if public access is enabled for cluster hosts (see Virtual Private Cloud pricing).
• Each transfer: use of computing resources and number of transferred data rows (see Data Transfer pricing).

Getting startedGetting started

Set up the 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 Greenplum® target cluster as mgp_user.

2. Create a database named mgp_db:

   CREATE DATABASE mgp_db;
   

Set up and activate the transferSet up and activate the transfer

1. Create a Greenplum®-type target endpoint and specify its cluster connection settings:

   • 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 new 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 (create a transfer).

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

      terraform validate
      

      Terraform will show any errors found in your configuration files.

   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 activate automatically upon creation. Wait for its status to change to Replicating.

Test the transferTest the transfer

To verify that the transfer is operational, test the copy and replication processes.

Test the copy operationTest the copy operation

1. Connect to mgp_db in your target Greenplum® cluster.

2. Run this query:

   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 your target Greenplum® cluster.

   2. Run this query:

      SELECT * FROM mmy_db.table1;
      

Delete the resources you createdDelete the resources you created

Some resources are not free of charge. Delete the resources you no longer need to avoid paying for them: