The point

The point

Many years ago, I worked with a Data General Nova machine that had core memory. It worked that way: turn it off at the end of the day, and it would pick up where it left off in the morning. Most of the time.

Persistent memory is not core memory, though, and it's not a replacement for DRAM, at least not now; it has rather different performance characteristics. So systems will have both types of memory for the foreseeable future. It differs rather significantly from an SSD, though, in that it is byte-addressable by the CPU. That changes a lot of the calculations and is why filesystems like NOVA may make sense.