README.md

postgres-to-s3

This is a Prefect Flow designed to iteratively pull data from a Postgres server running on AWS RDS service, and push the data to S3 as partitioned parquet files.

DAG

Connection details

The connection details for both Postgres and s3 are stored in a Prefect Secret in the following format:

{
    "database_user": "...",
    "database_pass": "...",
    "database_host": "...rds.amazonaws.com",
    "database_port": "...",
    "database_name": "...",
    "database_schema": "...",
    "s3_access_key": "...",
    "s3_secret_key": "...",
    "s3_server": "...",
    "s3_bucket": "..."
}

Flow Parameters

You can adjust the following Prefect Parameters:

• tables = List of strings containing table names you want to move
• indexed_field = String indicating which field is indexed in all of the tables to be moved
• starting_index = Integer indicating which index you want to start moving at
• total_records_to_move = Integer indicating how many rows you want to include in this Flow Run
• number_of_records_in_batch = Integer indicating when distributing the workload across multiple workers, how large should each batch be?