FLASH MEMORY PERSISTENT CACHE TECHNIQUES

Devices and techniques are disclosed herein for implementing, in addition to a first cache, a second, persistent cache in a memory system coupled to a host. The memory system can include flash memory. In certain examples, the first cache and the second cache are configured to store mapping information. In some examples, the mapping information of the second persistent cache is determined by the host using a persistence flag of memory requests provided to the memory system.