title: Cassandra Upgrade limitations
body: <p>We are upgrading from DSE 4.5 to DSE 4.8.9 in 10 node PRODUCTION cluster.
  We have daily batch jobs running in our application which  bulk load the data in the cluster , some jobs TRUNCATE the tables and load fresh data and some loader jobs which continuously insert the data. </p>
  
  <p>Consider these scenarios :</p>
  
  <p>Case 1 :
  Let say my one node has DSE 4.8 installed but upgradesstables is running .
  All nodes are online at this moment and 2 different schema exist (9 nodes on dse4.5 and 1 node on dse4.8.9).
  In this case , will TRUNCATE work ?</p>
  
  <p>Case 2:
  One of my nodes is fully upgraded to DSE 4.8 , which makes my cluster to be in partially upgraded state, all nodes online,2 schema exists (9 nodes on DSE 4.5 and 1 node on DSE 4.8).</p>
  
  <p>Will TRUNCATE work in this case ?</p>
  
  <p>Please suggest.</p>
  
  <p>Thanks!</p>