Fly.io replaces Sprites' homemade filesystem after checkpoint failures
Founder Kurt Mackey built the earlier storage stack; Fly.io says a 5,000-cycle test exposed failures the new block device is designed to avoid.
By RuntimeWire Staff · Published
Primary source: Fly.io
Why it matters
Sprites sell persistence and rollback as core features for agent workloads. Fly.io's storage rewrite addresses a failure mode in the system beneath both, while its migration guide says customers must initiate upgrades for older environments.
Fly.io is replacing the storage system beneath Sprites after a stress test left some environments unable to create checkpoints, exposing a failure in one of the product's core promises: a persistent Linux computer that can sleep, move between servers and keep its files. In a post published October 22nd, Fly.io described the replacement, the Sprites Block Device (SBD), as the standard filesystem for the service going forward.…
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