Скачать или смотреть Day 56: Multi-Tenant Task Scheduling - Building SaaS-Scale Isolation

Ever wonder how Shopify runs millions of store background jobs without one merchant's Black Friday sale crashing another's checkout? Or how Salesforce processes scheduled reports for 150,000+ customers simultaneously without data leaks? The secret is multi-tenancy - the architectural pattern that lets a single scheduler instance serve multiple isolated customers (tenants) securely and efficiently.
Think of it like an apartment building versus separate houses. Multi-tenancy is the apartment approach: shared infrastructure (plumbing, electricity, structure) but completely private living spaces. Each tenant gets their own isolated environment while sharing the underlying resources. This is how modern SaaS companies achieve massive scale without deploying separate systems for every customer.
Companies like Stripe process scheduled payouts for millions of merchants, Twilio handles recurring SMS campaigns for thousands of businesses, and Asana manages background task processing for countless teams - all using multi-tenant architectures. The challenge? Ensuring complete isolation while maintaining performance at scale.