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Loading data from Yandex Managed Service for YDB to Yandex Object Storage

Written by
Updated at October 28, 2024

You can migrate data from Managed Service for YDB to Object Storage using Data Transfer. To do this:

  1. Prepare the test data.
  2. Prepare and activate the transfer.
  3. Test the transfer.

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

Getting started

Prepare the infrastructure:

  1. Create a Managed Service for YDB database in any suitable configuration.

  2. Create an Object Storage bucket.

  3. Create a service account with the storage.editor and ydb.editor roles. The transfer will use it to access the database and bucket.

  1. If you do not have Terraform yet, install it.

  2. Get the authentication credentials. You can add them to environment variables or specify them later in the provider configuration file.

  3. Configure and initialize a provider. There is no need to create a provider configuration file manually, you can download it.

  4. Place the configuration file in a separate working directory and specify the parameter values. If you did not add the authentication credentials to environment variables, specify them in the configuration file.

  5. Download the ydb-to-object-storage.tf configuration file to the same working directory.

    This file describes:

    • Network.
    • Subnet.
    • Security group.
    • Service account with the storage.editor and ydb.editor roles.
    • Object Storage target bucket.
    • Endpoints.
    • Transfer.

  6. Specify the following in the ydb-to-object-storage.tf file:

  7. 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.

  8. Create the required infrastructure:

    1. Run the command to view planned changes:

      terraform plan

      If the resource configuration descriptions are correct, the terminal will display a list of the resources to modify and their parameters. This is a test step. No resources are updated.

    2. If you are happy with the planned changes, apply them:

      1. Run the command:

        terraform apply

      2. Confirm the update of resources.

      3. Wait for the operation to complete.

    All the required resources will be created in the specified folder. You can check resource availability and their settings in the management console.

Prepare the test data

  1. Create the seasons table in the Managed Service for YDB database:

    CREATE TABLE seasons
(
    series_id Uint64,
    season_id Uint64,
    title Utf8,
    first_aired Uint64,
    last_aired Uint64,
    PRIMARY KEY (series_id, season_id)
);

COMMIT;

  2. Populate the table with data:

    REPLACE INTO seasons (series_id, season_id, title, first_aired, last_aired)
VALUES
    (1, 1, "Season 1", CAST(Date("2006-02-03") AS Uint64), CAST(Date("2006-03-03") AS Uint64)),
    (1, 2, "Season 2", CAST(Date("2007-08-24") AS Uint64), CAST(Date("2007-09-28") AS Uint64)),
    (1, 3, "Season 3", CAST(Date("2008-11-21") AS Uint64), CAST(Date("2008-12-26") AS Uint64)),
    (1, 4, "Season 4", CAST(Date("2010-06-25") AS Uint64), CAST(Date("2010-07-30") AS Uint64)),
    (2, 1, "Season 1", CAST(Date("2014-04-06") AS Uint64), CAST(Date("2014-06-01") AS Uint64)),
    (2, 2, "Season 2", CAST(Date("2015-04-12") AS Uint64), CAST(Date("2015-06-14") AS Uint64)),
    (2, 3, "Season 3", CAST(Date("2016-04-24") AS Uint64), CAST(Date("2016-06-26") AS Uint64)),
    (2, 4, "Season 4", CAST(Date("2017-04-23") AS Uint64), CAST(Date("2017-06-25") AS Uint64)),
    (2, 5, "Season 5", CAST(Date("2018-03-25") AS Uint64), CAST(Date("2018-05-13") AS Uint64));

COMMIT;

Prepare and activate the transfer

  1. Create a target endpoint of the Object Storage type with the following settings:

    • Bucket: <name_of_previously_created_bucket>
    • Service account: <name_of_previously_created_service_account>
    • Serialization format: CSV
    • Encoding format: UNCOMPRESSED
    • Folder name: from_YDB

  2. Create a source endpoint of the YDB type and specify the DB connection parameters in it:

    • Database: Select the YDB database from the list.
    • Service account ID: Select the service account you previously created.

  3. Create a transfer of the Snapshot type that will use the created endpoints.

  4. Activate the transfer and wait for its status to change to Completed.

  1. In the ydb-to-object-storage.tf file, specify these variables:

    • target_endpoint_id: Target endpoint ID.
    • source_endpoint_id: ID of the source endpoint.
    • 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 the command to view planned changes:

      terraform plan

      If the resource configuration descriptions are correct, the terminal will display a list of the resources to modify and their parameters. This is a test step. No resources are updated.

    2. If you are happy with the planned changes, apply them:

      1. Run the command:

        terraform apply

      2. Confirm the update of resources.

      3. Wait for the operation to complete.

  4. Activate the transfer and wait for its status to change to Completed.

Test the transfer

Make sure the data has been migrated from Managed Service for YDB to the Object Storage bucket:

  1. In the management console, select the folder where the bucket is located.
  2. In the list of services, select Object Storage.
  3. Select the bucket from the list.
  4. Go to the Objects tab.
  5. Check that the Object Storage bucket contains the from_YDB folder with the <seasons.csv> object with test data.

Delete the resources you created

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

  1. Delete the transfer.
  2. Delete the endpoints.

Delete the other resources depending on how they were created:

  1. In the terminal window, go to the directory containing the infrastructure plan.

  2. Delete the ydb-to-object-storage.tf configuration file.

  3. 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.

  4. Confirm updating the resources.

    1. Run the command to view planned changes:

      terraform plan

      If the resource configuration descriptions are correct, the terminal will display a list of the resources to modify and their parameters. This is a test step. No resources are updated.

    2. If you are happy with the planned changes, apply them:

      1. Run the command:

        terraform apply

      2. Confirm the update of resources.

      3. Wait for the operation to complete.

    All the resources described in the ydb-to-object-storage.tf configuration file will be deleted.

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