title: Cassandra to Dynamo DB data migration scale issue
body: <p>Problem is very simple - I want to export 1 TB data from cassandra machine to Dynamo DB because Dynamo seems like it will fit better to my data model.</p>
  
  <p>Issue being faced - Cassandra data export to csv format wouldn't finish due to sheer size of data.</p>
  
  <p>What is the performant way to do this ? </p>
  
  <p>This is not a possible duplicate of <a href="https://stackoverflow.com/questions/24896336/export-large-amount-of-data-from-cassandra-to-csv">Export large amount of data from Cassandra to CSV</a>
  because reading data  around 1TB would be too overwhelming for a java job and would take a lot of time too.</p>