How Amazon handles concurrent order updates in DB?

by user3198603   Last Updated August 07, 2018 06:04 AM

Generally there are either or both below 2 line of defence different sites uses to maintain concurrency updates

  1. If inventory goes below specific threshhold, site does not display those item
  2. While adding to cart , lock the item for some time limit, check if item is available. If yes allow to add, otherwise display some informative message

My understanding is amazon does not follow any of these two. Just accept the order without checking the stock. It reconciles the out of inventorya\ at the time of dispatch. If out of stock, notify the customer with next steps. Is that correct ?

Tags : ecommerce amazon

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