== Update Processing Versus Magic - Problems and potential solutions ==

There will not be enough disk space in the IPP cluster to retain all data products
for the PS1 survey. 

The static sky images and catalogs will be retained but most of the processed images
will be deleted sometime after they are processed and perhaps released. The deletion process is known as ''cleanup''. During cleanup enough information is retained so that the pixels can be regenerated. The process of recreating the images is known as ''update''.