Keynote: WASI - A new kind of system interface & what it means for cloud native

on YouTube ↗21m

" summary

WASI defines a modular system interface for WebAssembly that replaces file-centric APIs with primitive I/O types so binaries run portably across OSes while keeping sandboxing. It proposes three migration paths (legacy FS, per-module virtualized FS, or direct WASI I/O types), moves metadata handling to the host, and claims dramatic IPC wins: eliminating repeated syscall/serialization copies that consume two thirds of same-host steps and enabling nanosecond calls between sandboxes.

AI-written summary · about

" chapters (10)

1. 0:00Start
2. 3:07create a very modular set of system interfaces
3. 7:15building a backup application
4. 7:36push as much of the meta compute out to the edges
5. 10:47compile a module
6. 11:18link your code against a version of libc
7. 12:26providing a compatibility layer
8. 13:59eliminating the overhead of the per module virtualized file
9. 15:37move these details out to the edges
10. 19:33allowing for various network failure failure modes and supporting non-blocking

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