Migrating data from Yandex Data Streams using Yandex Data Transfer

With Data Transfer, you can transfer data from a Data Streams-enabled stream to an Yandex Object Storage bucket.

1. Set up a stream in Data Streams.
2. Set up and activate your transfer.
3. Test your transfer.

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

Required paid resourcesRequired paid resources

The support cost includes:

• Fee for the Managed Service for YDB database. The charge depends on the usage mode:

  • For the serverless mode, you pay for data operations and the amount of stored data.
  • For the dedicated instance mode, you pay for the use of computing resources, dedicated DBs, and disk space.

  Learn more about the Managed Service for YDB pricing plans.

• Data Streams fee. The fee depends on the pricing mode:

  • Based on allocated resources: You pay for the number of units of written data and resources allocated for data streaming.
  • Based on actual use:

    • If the DB operates in serverless mode, the data stream is charged under the YDB serverless mode pricing policy.

    • If the DB operates in dedicated instance mode, the data stream is not charged separately (you only pay for the DB, see the pricing policy).

  Learn more about the Data Streams pricing plans.

• Object Storage bucket fee: Storing data and performing operations with it (see Object Storage pricing).

Getting startedGetting started

Set up your infrastructure:

Set up a Data Streams-enabled streamSet up a Data Streams-enabled stream

1. Create a Data Streams-enabled stream.

2. Send test data to the data stream. Use data from the vehicle sensors in JSON format as a message:

{
    "device_id":"iv9a94th6rzt********",
    "datetime":"2020-06-05T17:27:00",
    "latitude":"55.70329032",
    "longitude":"37.65472196",
    "altitude":"427.5",
    "speed":"0",
    "battery_voltage":"23.5",
    "cabin_temperature":"17",
    "fuel_level":null
}

Set up and activate the transferSet up and activate the transfer

1. Create a source endpoint:

   • Database type: Yandex Data Streams.

   • Endpoint settings:

     • Connection settings:

       • Database: Select the Managed Service for YDB database from the list.
       • Stream: Specify the name of the Data Streams-enabled stream.
       • Service account: Select or create a service account with the yds.editor role.

     • Advanced settings:

       • Conversion rules: JSON.

       • Data scheme: JSON specification:

         Create and upload a json_schema.json data schema file:

         json_schema.json

         [
             {
                 "name": "device_id",
                 "type": "string"
             },
             {
                 "name": "datetime",
                 "type": "datetime"
             },
             {
                 "name": "latitude",
                 "type": "double"
             },
             {
                 "name": "longitude",
                 "type": "double"
             },
             {
                 "name": "altitude",
                 "type": "double"
             },
             {
                 "name": "speed",
                 "type": "double"
             },
             {
                 "name": "battery_voltage",
                 "type": "any"
             },
             {
                 "name": "cabin_temperature",
                 "type": "double"
             },
             {
                 "name": "fuel_level",
                 "type": "any"
             }
         ]
         

2. Create a target endpoint:

   • Database type: Object Storage.

   • Endpoint settings:

     • Connection settings:

       • Bucket: Enter the name of the bucket in Object Storage.
       • Service account: Select or create a service account with the storage.uploader role.

     • Serialization format: Select JSON or CSV if you have enabled Conversion rules in the advanced settings for the source endpoint.

3. Create a transfer:

   Manually

   Terraform

   1. Create a transfer of the Replication type that will use the created endpoints.
   2. Activate your transfer.

   1. In the data-transfer-yds-obj.tf file, uncomment the following:

      • Variables:

        • source_endpoint_id, and set it to the endpoint ID value for the source.
        • target_endpoint_id, and set it to the endpoint ID value for the target.

      • yandex_datatransfer_transfer resource.

   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.

      Once created, your transfer will be activated automatically.

Test your transferTest your transfer

1. Wait until the transfer status switches to Replicating.

2. Make sure the data from the Data Streams-enabled stream has been moved to the Object Storage bucket:

   1. In the management console, select the folder the bucket is in.
   2. From the list of services, select Object Storage.
   3. Select the bucket from the list.
   4. Make sure the bucket contains the <stream_name>_0.raw file (.json or .csv, depending on the selected output format) with the test data.

3. Send a new message to the Data Streams-enabled stream:

   {
       "device_id": "rhibbh3y08qm********",
       "datetime": "2020-06-06 09:49:54",
       "latitude": 55.71294467,
       "longitude": 37.66542005,
       "altitude": 429.13,
       "speed": 55.5,
       "battery_voltage": null,
       "cabin_temperature": 18,
       "fuel_level": 32
   }
   

4. Make sure the following data has been added to the Object Storage bucket:

   1. In the management console, select the folder the bucket is in.
   2. From the list of services, select Object Storage.
   3. Select the bucket from the list.
   4. Make sure the bucket now contains the <stream_name>_0-1_1.raw file (.json or .csv, depending on the selected output format) with the new data.

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:

1. Delete the transfer.
2. Delete the endpoints for both the source and target.
3. Delete the objects from the Object Storage bucket:

Delete the other resources depending on how they were created: