Fly.io is a cloud platform focused on running applications close to users, and its blog serves as the company’s engineering journal. Posts cover the internals of the platform, from networking and deployment to storage, rather than marketing announcements.
The featured article, “SBD: We Have a Filesystem at Home,” describes how the Sprites feature outgrew a purpose-built filesystem and moved to a plain ext4 disk on a block device backed by a bucket. It is a practical case study in choosing boring, proven technology over clever custom infrastructure.
The blog is aimed at backend engineers, platform teams, and anyone curious about the design decisions behind a managed cloud. Readers who enjoy postmortems, architecture trade-offs, and low-level systems detail will find the most value here.
Use the blog as a supplement to the official documentation when evaluating Fly.io or learning how its storage and compute layers work. Start with posts relevant to your stack, and treat the code-level details as context rather than step-by-step guides.
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