VideoExplainers

Some ideas need a whiteboard

Short explainers for the concepts that keep coming up in interviews and code review, pitched at whoever is meeting them for the first time.

In production 1

ExplainerRetrievalScript ready

What is a vector database?

Once you store meaning instead of strings, exact matching stops being useful and approximate nearest neighbour search takes over. What that changes, what it costs, and when your existing database is still the right answer.

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On the list

ExplainerCloud storage

Blob Storage or Data Lake?

They look interchangeable until you need hierarchical namespaces, per-directory access control, or analytics engines that expect a filesystem. A practical comparison.

In progress

ExplainerEvaluation

Why 90% accuracy can mean nothing

Class imbalance, leakage, and the difference between a model that is right and a model that is confident. Mostly a list of ways I have fooled myself.

In progress