What Modern NVMe Storage Can Do, and How to Exploit It: High-Performance I/O for High-Performance Storage Engines
In the past decade, flash SSDs have displaced magnetic disks as the default persistent storage medium for oper- ational database systems.
SSDs not only have high throughput, they are also cheap: after a decade of stagnating DRAM prices and rapidly decreasing flash prices, enterprise-grade SSDs cost less than $200 per TB, which is about 10-50 times cheaper than DRAM.