/ THE FEED /
Deep, recent reads ranked by depth and freshness.
01Fly.io · migration
Fly.io replaced a custom JuiceFS-based filesystem for their Sprites infrastructure with the Sprites Block Device (SBD) to eliminate complex, out-of-sync metadata ledgers. SBD presents object storage as a block device over NBD, allowing standard ext4 to manage the filesystem and simplifying checkpoints and restores. The result is significantly improved reliability and a much simpler storage architecture.
DEPTH ■■■■■6 min read3 days ago
02Yelp · architecture
Yelp developed a chat interface called Yelp Assistant using a hybrid approach combining native UI components and a server-driven UI framework called CHAOS. This architecture allows the team to dynamically update the chat experience without waiting for app store releases. The system separates views from data using reactive datasets and MessageEvents to manage the chat loop, state, and user interactions.
DEPTH ■■■■■12 min read3 weeks ago
03Stripe · practice
The author examines the limitations of token-based billing as a customer-facing pricing model, noting that it exposes internal margins and commoditizes AI products. The company explored abandoning token billing entirely but realized its necessity for backend cost tracking and margin management. Ultimately, the piece proposes unified credits and output-based pricing as better ways to align invoices with customer value.
DEPTH ■■■■■7 min read3 weeks ago
