Abstract Persistence is a term used to describe the copying of data from volatile memory (such as RAM) to non-volatile memory (such as the disk) in order for it to persist in a case of a crash or power-down.

Orthogonal Persistence means that the operating system offers only non-volatile memory that always persists to the applications, and thus frees them from considerations of persistence as well as "bootup" and "shutdown" sequences.

Please find the following attachments"Orthogonal Persistence in Linux seminar report/pdf/ppt download"