title: Cassandra Wide Row/Dynamic Columns
body: <p>I'm new to NoSQL; so, I'm trying to understand some of the Cassandra concepts that I can't really get from the dozens of sources that I have studied.</p>
  
  <ol>
  <li>Should I consider wide row, and dynamic columns as synonyms; or are they 2 different concepts?</li>
  <li>Am I correct in thinking of columns of collection types as wide row?</li>
  <li>It seems to me that wide row is a concept from earlier versions of Cassandra, and can be created only through Thrift API; whereas collection types are the modern versions of wide rows.</li>
  <li>Are collection types still limited to 64k elements?  Or that after CQL 3, that limitation has been removed?</li>
  </ol>