text: Spectrum Scale enforces the existence of the files that were created on the Power Systems 
  cluster in the AWS cluster, as shown in Example 7-23. Spectrum Scale also updates the 
  writes on both clusters (sides). There is a**prefetch**command that brings all the data before,; 
  therefore, only the changes are updated after prefetch is done. This makes accessing the full 
  database faster in the cloud. 