About
A reference for the parts of computer science that senior engineers assume and everyone else has to reverse-engineer from an outage.
Why “yield point”
In materials science, the yield point is the exact stress at which something stops springing back and deforms for good. Below it, a beam under load returns to true when you take the weight off. Above it, the bend is permanent.
That is what every page here is for. A quorum, an LSM tree and a token budget all have a point where they stop behaving, and finding it is what turns a definition you can recite into an intuition you can use. The name is also an example of what the site is about: a term senior engineers nod at and nobody ever taught you.
Every concept has the same five parts
The rigidity is deliberate. Once you have read two concepts you know exactly where to look on the third: the hook (what breaks without this), the widget (grokkable in thirty seconds, breakable in sixty), the dial (the tradeoff you are actually buying), the line (what you would say out loud when someone asks), and the sources.
You break it, you do not watch it
Every widget shares the same failure verbs - partition,drop, delay, restart,skew clock, saturate, stall - so intuition you build on one concept transfers to the next instead of resetting. The widgets are real implementations, not animations: where a closed-form formula exists, the simulation is tested against it. If our prose is wrong, the widget will visibly disagree with it.
How we handle sources
Attribution is part of the format, not a footer. Concretely:
- Every non-obvious factual claim carries an inline citation. An unresolved citation fails the build.
- Every concept cites at least one primary source - the paper, the RFC, or real source code. Blog posts and talks are secondary and never sufficient alone.
- Quotations are excerpts with a locator so you can find the passage, capped at 50 words. We link; we do not reproduce.
- Our own judgment is labelled as ours. Where you see Our take, that is synthesis and not something a source asserts. Shown by the widget means the simulation on the page is the evidence. Sources disagree means we are not going to pretend a live debate is settled.
- A quote marked unverified has not yet been checked word-for-word against the original. We would rather show you that badge than quietly hope.
Corrections and contact
If something here is wrong, if we have misattributed or over-quoted your work, or if you have any other copyright or legal concern, write to yieldpointsupport@gmail.com and we will fix it. Every source on this site is cited and linked rather than reproduced, and quotations are excerpts with a locator, but if we have got the balance wrong on a particular page we would rather hear it from you than not.
Free
Every concept and every widget is free, with no account. That is not a trial. If we ever charge, it will be for the retention system built on top - spaced repetition, progress across devices, scheduling against a date you need to be ready by - never for the reference itself.