METHOD AND SYSTEM FOR RAM CACHE COALESCING

摘要

A system and method for coalescing data fragments in a volatile memory such as RAM cache is disclosed. The method may include storing multiple data fragments in volatile memory and initiating a single write operation to flash memory only when a predetermined number of data fragments have been received and aggregated into a single flash write command. The method may also include generating a binary cache index delta that aggregates in a single entry all of the binary cache index information for the aggregated data fragments. A memory system having a non-volatile memory, a volatile memory sized to at least store a number of data fragments equal to a physical page managed in a binary cache of the non-volatile memory, and a controller is disclosed. The controller may be configured to execute the method of coalescing data fragments into a single flash write operation described above.

主权项

1. A method of storing data received from a host system, the method comprising:
in a memory device having a non-volatile memory, a volatile memory and a controller in communication with the non-volatile memory and volatile memory, the controller: receiving data fragments from the host system, each data fragment comprising an amount of data less than a physical page size managed in the non-volatile memory; storing the data fragments in the volatile memory as they are received; upon receiving a predetermined number of the data fragments, aggregating the predetermined number of data fragments into a single write command having a second amount of data equal to the physical page size managed in the flash memory; and writing the second amount of data in the single write command to the non-volatile memory.