1 min lesson
Scale & stack reality check
Rebuild the parts of "Scale & stack reality check", then say why each one matters.
Step 1 of 2
"Billions of data per day" is the explicit bar in the JD. That number should change how you reason about every design - it is the difference between a clever script and a system that survives Monday morning.
Get comfortable doing throughput math out loud. A billion events a day is roughly 11,500 per second on a flat average and product traffic is never flat - peaks run several times that. An interviewer wants to see you reach for that arithmetic before you reach for a tool.
The scale you're designing for
- Events / day
- Billions - the stated bar for ingestion scaling.
- Flat average
- ~11.5K events/sec per billion/day; assume peaks 3-5x that.
- Storage horizon
- TB-to-PB on the bronze layer; cost-per-TB is a real line item.
- Users
- Millions of developers on the product generating the telemetry.
Rough numbers to anchor a design conversation, not exact published figures.