We currently have all of our image data loaded into ArcGIS SDE/Oracle 9.3. There is a proposal to not load our 2015 orthoimagery into SDE/Oracle in order to save time and place it in a tile cache or gdb on a network drive. Historically the image data has been around 250GB in size. The orthoimagery would be used simultaneously (read only) by many ArcGIS 10.1 desktop users (I would estimate ~100 max, probably more like 30 on a normal day). Are we likely to have performance problems with this approach? If there is no big down side what would be the recommended format to keep the orthoimagery in?
I guess the other option would be to place it on the ArcGIS server's local drive and just let the users consume the data as a ArcGIS map service.