[LSF/MM/BPF TOPIC] NVMe HDD

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Background:

NVMe specification has hardened over the decade and now NVMe devices
are well integrated into our customers’ systems. As we look forward,
moving HDDs to the NVMe command set eliminates the SAS IOC and driver
stack, consolidating on a single access method for rotational and
static storage technologies. PCIe-NVMe offers near-SATA interface
costs, features and performance suitable for high-cap HDDs, and
optimal interoperability for storage automation, tiering, and
management. We will share some early conceptual results and proposed
salient design goals and challenges surrounding an NVMe HDD.


Discussion Proposal:

We’d like to share our views and solicit input on:

-What Linux storage stack assumptions do we need to be aware of as we
develop these devices with drastically different performance
characteristics than traditional NAND? For example, what schedular or
device driver level changes will be needed to integrate NVMe HDDs?

-Are there NVMe feature trade-offs that make sense for HDDs that won’t
break the HDD-SSD interoperability goals?

-How would upcoming multi-actuator HDDs impact NVMe?


Regards,
Tim Walker




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