عرض عملي: إبقاء 120 متجرًا قادرة على البيع عند تعطل المنصة المركزية

خطوة بخطوة

1. List what a store needs to sell: product and price data, tax rules, payment, receipt, stock decrement.
2. Design the store edge: local cache of catalog and prices, local queue of sales, card terminals with provider offline mode within limits.
3. Define limits: maximum offline period and value, returns allowed or blocked, loyalty points deferred.
4. Planned mistake: assume the store link is always up because it is redundant. Fix: treat "platform unreachable" as a normal scenario with a tested degraded mode.
5. Design reconnection: replay the queue with idempotent sale IDs, reconcile stock and payments, and define resilience tests (cut the link in a pilot store).