[$] Zoned storage and filesystems

Post Syndicated from original https://lwn.net/Articles/932748/

Issues around zoned storage for filesystems was the topic of a combined
storage and filesystem session at
2023 Linux Storage, Filesystem,
Memory-Management and BPF Summit
led by
Bart Van Assche,
Viacheslav A. Dubeyko, and Naohiro Aota. Zoned storage began with the
advent of shingled
magnetic recording
(SMR) devices, but is now implemented by NVMe zoned
(ZNS) as well.
SMR devices can have multiple zones with different
characteristics, with some zones that can only be written in sequential
order, while other, conventional zones can be written in any order. The
talk was focused on filesystems using the sequential type of zones
since the conventional zones are already well-supported in Linux and its