AT1

• when
  • I start optimize
• then
  • I can configure multiple engines to import the data from
  • I can configure import process strategy
    • round robin - engine from which entities are imported is changing every round
    • full import - data from one engine is imported fully first

AT2

• given
  • multiple engines are configured for import
• when
  • import is in progress
• then
  • data is imported according to the import strategy
  • index is maintained for every engine separately