Hacker News Reader

My understanding is nvme drives are SSD drives, it's just a different interface. It goes over the pcie bus instead of thru sata / sas which have to go thru another processor that introduces overhead. So they are just faster SSD drives because the connection method and communication format is different.

View on HN

By the way, there's an interest research on designing a new file system based on LSM tree that leverages SSD's sequential writing, as it is mainly motivated by SSDs' shortcomings with random writes: https://www.usenix.org/legacy/event/fast/tech/full_papers/Mi...

You are correct about current flash NVMe drives. The main benefit of NVMe over SATA is lower protocol overhead and more queues. However, it is expected that some sort of low-latency non-volatile storage will become available at some point and that will probably only make sense to put behind NVMe.

Intel's Optane is one example, although it isn't quite as fast or as durable as Intel's initial marketing claims.

Reply on news.ycombinator.com