ИСТИНА

In the first decades of the 21st century significant changes occurred (and continue to occur) in the technology of hardware storage. So-called block solid-state drives (SSD), based on flash memory technology and relatively quickly catching up with HDD in terms of maximum capacity, surpassed them in a number of other characteristics (losing mainly only in price). In recent years, the prospect of market appearance of nonvolatile random access memory (NVRAM, also called more expressively Storage Class Memory, SCM) became real. This memory allows byte addressing and is directly accessible to processor instructions, but saves its contents after a power failure. Using SCM opens the way to building a database based on a one-level memory. These databases can be much faster than disk with a simpler organization.