title: Amazon Web Services S3 Request Limit
body: <p>I'm using AWS to run some data processing. I have 400 spot instances in EC2 with 4 processes each, all of them writing to a single bucket in S3. I've started to get a (apparently uncommon) error saying:</p>
  
  <blockquote>
    <p>503: Slow Down</p>
  </blockquote>
  
  <p>Does anyone know what the actual request limit is for an S3 bucket? I cannot find any AWS documentation on it.</p>
  
  <p>Thank you!</p>