docs-archive/apache-airflow-providers-amazon/3.4.0/_sources/operators/transfer/dynamodb_to_s3.rst.txt

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Amazon DynamoDB to Amazon S3 Transfer Operator
==============================================

Use the DynamoDBToS3Operator transfer to copy the contents of an existing Amazon DynamoDB table
to an existing Amazon Simple Storage Service (S3) bucket.

Prerequisite Tasks
^^^^^^^^^^^^^^^^^^

.. include:: ../_partials/prerequisite_tasks.rst

.. _howto/transfer:DynamoDBToS3Operator:

DynamoDB To S3 Operator
^^^^^^^^^^^^^^^^^^^^^^^

This operator replicates records from a DynamoDB table to a file in an S3 bucket.
It scans a DynamoDB table and writes the received records to a file on the local
filesystem. It flushes the file to S3 once the file size exceeds the file size limit
specified by the user.

Users can also specify a filtering criteria using dynamodb_scan_kwargs to only replicate
records that satisfy the criteria.

To get more information visit:
:class:`~airflow.providers.amazon.aws.transfers.dynamodb_to_s3.DynamoDBToS3Operator`

Example usage:

.. exampleinclude:: /../../airflow/providers/amazon/aws/example_dags/example_dynamodb_to_s3.py
    :language: python
    :dedent: 4
    :start-after: [START howto_transfer_dynamodb_to_s3]
    :end-before: [END howto_transfer_dynamodb_to_s3]

To parallelize the replication, users can create multiple DynamoDBToS3Operator tasks using the
``TotalSegments`` parameter.  For instance to replicate with parallelism of 2, create two tasks:

.. exampleinclude:: /../../airflow/providers/amazon/aws/example_dags/example_dynamodb_to_s3_segmented.py
    :language: python
    :dedent: 4
    :start-after: [START howto_transfer_dynamodb_to_s3_segmented]
    :end-before: [END howto_transfer_dynamodb_to_s3_segmented]