title: How does a random hash prefix improve S3 large-scale GET performance?
body: <p>I'm going to go ahead and point out this has been asked and answered here <a href="https://stackoverflow.com/questions/43035449/add-a-random-prefix-to-the-key-names-to-improve-s3-performance">Add a random prefix to the key names to improve S3 performance?</a> — insufficiently in my opinion.</p>
  
  <p>Can someone explain in more layman's terms exactly how adding a random hash prefix to objects to be accessed at scale helps performance?</p>
  
  <p>A scenario will probably help illustrate my lack of understanding:</p>
  
  <p>1000 Clients all are trying (with appropriate permissions) to perform GET requests on object <code>foo</code> in bucket <code>bar</code>, so how would making <code>foo</code> --> <code>4jd8fb-foo</code> help alleviate stress on the system? Do the clients not still all want the same object in their GET requests?</p>
  
  <p>I'm obviously missing something that's probably silly, but I'd really like to wrap my head around why this helps— I'd guess my misunderstanding stems from how S3 handles indexing and partitioning but some further guidance would be greatly appreciated.</p>