Flowcharts & Processes

Inventory Reservation with TTL Expiry

Flowcharts & Algorithms diagram · made in Skemio

Flowchart showing inventory reservation with TTL expiry: cart selection, stock availability check, TTL locking, payment evaluation, and stock release.
Flowchart showing inventory reservation with TTL expiry: cart selection, stock availability check, TTL locking, payment evaluation, and stock release.
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What it shows

  • Redis TTL keys create lock holds for 10-15 minutes during checkout.
  • A 2-phase commit converts reservations into permanent orders on payment.
  • Dead-letter queues or key expiry auto-return unsold inventory to stock.

The takeaway

Temporary TTL reservations prevent overselling while keeping abandoned carts from locking stock forever.

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