title: Is there an open-source equivalent to Amazon S3?
body: <p>Is there an open-source equivalent to the Amazon S3 storage service running under Linux?</p>
  
  <p>For example a bucket-based file system like:</p>
  
  <ul>
  <li>store file -> get unique id  </li>
  <li>access file by unique id  </li>
  <li>delete file by unique id  </li>
  <li>query files by timestamp  </li>
  <li>...</li>
  </ul>
  
  <p>Thanks.</p>