Flash storage memory

The prospects of flash memory are alluring the primary storage hierarchy, but the challenges are still lying to find uses for it that strike the right balance between cost and performance. Storage hierarchy is looking for flash as a means to enhance primary storage rather than replacing the existing storage. The cost of flash devices is also decreasing as the cost of the per unit storage has lessen and the electronic industry is anticipating ubiquity of the flash for storage hierarchy. The cost of the flash per gigabyte, although falling quickly, is still far more than that of the hard drives and only a small number of applications have the performance needs that justifies the expense. Cost trends in the distinct flash categories are widening the gap between DRAM and the a bit unusual flash performance due to its being highly asymmetric is posing a challenge for using it in a storage system.