If I have several portlets on a page what is the order of execution of these portlets in Vignette (Open text) Portal. Lets say I have a portal page with this layout. Do they always execute in the serial order i.e top to bottom or that cannot be guaranteed. Also if we have two portlets in the page, A and B in that order then does the view for B start executing only after A is completely done or do they run in parallel. I am not too familiar with the portlet architecture hence want to confirm with the experts. The reason I want to know this is I want to save the data I get from database in portlet A in request/session and reuse it in portlet B. So I am not very sure if the data will be available in B by the time B executes.