RAM-диск(A RAM drive (also called a RAM disk) is a block of random-access memory (primary storage or volatile memory) that a computer's software is treating as if the memory were a disk drive (secondary storage). It is sometimes referred to as a virtual RAM drive or software RAM drive to distinguish it from a hardware RAM drive that uses separate hardware containing RAM, which is a type of battery-backed solid-state drive. wikipedia.org)
оперативная память для хранения тегов(A specialized bank of static RAM used to hold addresses. When a stored address matches an input address, a signal is output to perform a function. It is used with hardware devices such as CPU caches to keep track of which memory addresses are stored in the cache.)