Prologue - What is Large-scale Processing?
A definition of large-scale processing from an engineering perspective, integrating the Four Golden Signals (SRE) and the Theory of Constraints (TOC).
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3907102) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Dayul Lee Posted on May 1 • Originally published at lukyday-blog.vercel.app Prologue - What is Large-scale Processing? #largescale #networking #backend #systemdesign Published: March 18, 2026 3 AM, October 2025. A single DNS configuration error on an AWS server brought Snapchat, Roblox, and McDonald's to a standstill. 3,500 companies across 60 countries were stopped cold by one small crack. Systems are far more fragile than we think.
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