Database i/o:cmp, Hibernate

★ What is "persistence"

Friends who have used VMware probably know that when a guest OS is running, clicking "Suspend" hangs the virtual OS, which will save the entire virtual memory to disk, for example, you allocate 128M of running memory to the virtual OS. After that, you will find a 128M file in the same directory as the virtual OS, which is the full image of the virtual OS memory! This means of memory mirroring is actually the origin of the concept of "persistence" (persistence).

Database i/o:cmp, Hibernate