Design log search for four hundred services and fifty teams, at ten terabytes a day.

The hard parts are not search. They are deciding what to keep before you pay to store it, isolating one team's query from everyone else's, and making the cost visible to the people generating it.

Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.