I have an issue with a SharePoint farm, it has both SharePoint Search and Fast Search configured. When SharePoint Search is configured on its own, search indexes everything in around 20 minutes, as soon as fast search is in the mix crawls take inordinate amounts of time to complete.
As its a shared farm I was hoping that one set of apps could have SharePoint Search and others would use Fast search. Is this a possible scenario and more importantly is it a supported solution?