Kanchan Joshi | Staff Engineer
Samsung Electronics
Kanchan is a Associate Director at Samsung (SSIR), where he leads a team adding advances in the Linux Storage Stack.
His current work revolves around developing generic OS interfaces for new NVMe features. In past, he has presented at SDC, OSS, LPC, and LSFMM. He has engaged in system-software development across operating systems and published peer-reviewed papers at top conferences.
Appearances:
Future of Memory and Storage - Day 3 @ 14:25
Spatial Data Placement in Linux with NVMe FDP
Standard SSDs abstract physical data placement, restricting the host to purely logical LBA management. NVMe Flexible Data Placement (FDP) relaxes this barrier, enabling the host to segregate multiple data streams into physical Reclaim Units. This reduces device-internal write amplification, yielding tangible benefits: extended drive endurance, predictable QoS, and improved energy efficiency. Exposing this hardware-software co-design requires architectural evolution within the OS. This talk will explore how the Linux storage stack is being adapted to support spatial data placement. We will cover the new I/O paths and user-space interfaces that are being introduced for application developers and infrastructure architects, enabling alignment between software data layouts and hardware-level isolation to reduce TCO and mitigate latency spikes.
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