The main advantages of persistent memory include:
Persistent memory can be used in a variety of ways to deliver lower latency for applications, such as:
Nonvolatile random-access memory (NVRAM) is random-access memory that retains its information even if there is no power. If power is lost before the data is written to disk, you don’t lose the data because it can be recovered from NVRAM.
NVRAM uses battery backup to keep data persistent. During this time it can flash the data out to a flash device that is attached directly. In most cases, NVRAM resides on the PCIe bus.
PMEM or NVDIMM-N can also be backed up by battery. It resides only on the memory bus.