Persistence is said to be "orthogonal" or "transparent" when it is implemented as an intrinsic property of the … See more

Using system images is the simplest persistence strategy. Notebook hibernation is an example of orthogonal persistence using a system image because it does not require any actions by the programs running on … See more

Any software layer that makes it easier for a program to persist its state is generically called a persistence layer. Most persistence layers will not achieve persistence directly but will use an underlying database manageme… See more

System prevalence is a technique that combines system images and transaction journals, mentioned above, to overcome their limitations.
Shortcomings: A prevalent system must have enough … See more

DBMSs use a combination of the dirty writes and transaction journaling techniques mentioned above. They provide not only persistence but also other services such as queries, auditing and access control. See more

Persistent operating systems are operating systems that remain persistent even after a crash or unexpected shutdown. Operating systems that employ this ability include
• KeyKOS
• EROS, the successor to KeyKOS… See more