title: Publish a list of "objects" to SNS in one message, then subscribe with a master lambda, feed to slaves
body: <p>Wondering if this is recommended. </p>
  
  <p>With a master lambda, subscribe to an SNS topic where I publish a message which contains a list of source/destination pairs for s3. Say 100 per message.</p>
  
  <p>The master lambda with then loop though those pairs and call a slave worker for each item in the list which will do the copy of S3 objects from source to destination.</p>
  
  <p>I was originally trying to use SQS but SQS is not an event source for lambda. Cloudwatch Events are too murky as how you pass actual data as payload.</p>
  
  <p>So wondering if my approach above is valid and will hold up, or if there's a better alternative.</p>
  
  <p>Thanks</p>