title: How to compute 'DynamoDB read throughput ratio' while setting up DataPipeline to export DynamoDB data to S3
body: <p>I have a DynamoDB with ~16M records where each record is of size 4k. The table is configured for autoscaling Target utilization: 70%, Minimum provisioned capacity for Reads: 250 and Maximum provisioned capacity for Writes: 3000. </p>
  
  <p>I am trying to setup data pipeline to backup DynamoDB to S3. The pipeline configuration asks for <code>Read Throughput Ratio</code> which is 0.25 by default.</p>
  
  <p>So the question is how to compute <code>Read Throughput Ratio</code> to back up the table in ~1 Hours. I understand the read capacity units. How is the <code>Read Throughput Ratio</code> related to <code>Read Capacity Units</code> and <code>Auto Scaling Configuration</code>?</p>