Continuous backup systems utilizing flash memory

A continuous-backup mechanism for main-memory databases that transmits data to archive storage during utilization of main memory without any software assistance is described. It is suggested that flash memory-based storage can improve the efficiency of conventional disk systems since it can realize faster read and write operations. As sequential access is performed by a series of direct accesses, the overhead caused by scheduling to utilize sequential access is not required. One serious drawback of flash memory is the limit of the number of rewrite operations. Mechanisms that have a five-year lifetime have been developed using existing technology. Results of a performance evaluation of the backup system are presented