In the previous entry on this ongoing series covering the flash storage revolution, I concluded that flash is now an essential part of enterprise storage. But its value proposition is hinged on high utilization. High utilization cannot be sustained without efficient auto-tiering or accurate cache sizing for flash-based cache.
This article will describe the theory behind optimal cache sizing. Practical guidance will follow in part three, the last entry in this series. I will again lean heavily on Denis Vilfort’s presentation that I offer for download on my blog.