Deep Dives

Follow the query all the way down.

Interactive essays about the systems problems shared by multimodal data. Each starts with a concrete request, reads the structure inside the stored object, and accounts for the bytes and compute required to produce a useful answer.

The territory

Logical intent has physical consequences.

  1. 01

    Interpret the request

    Which logical units, coordinate frames, time windows, and output shapes did the machine ask for?

  2. 02

    Read the structure

    Which indexes, chunks, samples, and native types make those units addressable?

  3. 03

    Plan the work

    Which byte ranges, dependencies, decodes, transforms, and joins are actually required?

  4. 04

    Materialize the answer

    Which physical layout and memory path delivers the requested batch without wasted work?

Featured specimen

One file. Every layer.

Source specimenH.264 · MP4

Video

Machines do not press play.

A frame query is not a playback request. Inspect a real MP4, choose an access pattern, and trace it from timestamps through container indexes, codec dependencies, object-store byte ranges, decode, transforms, and model-ready tensors.

timestamps → presentation frames → compressed samples → decode closure → byte ranges → RGB tensors
Trace the query

The specimen changes. The systems questions persist: what the data means, where it lives, what work the query requires, and which representation should reach the machine.