The Slot – How to Use Deployment Slots to Organize Your App Instances

Slot

The slot is an area of the ice hockey goal where there is the best chance for a center or winger to shoot the puck directly into the net without a deflection. It is also a position that often causes controversy because players in the slot are given greater opportunities to score by opposing coaches and managers than other areas of the ice.

The earliest slots were mechanical devices where gamblers dropped coins to activate games for each spin. In live casinos, this practice eventually gave way to bill validators and credit meters that allowed bettors to use advance deposits instead of cash. By the 1990s, slots had replaced blackjack and other table games as the dominant gambling machines.

Modern slot machines use microprocessors to assign a different probability to each symbol on each reel. This makes the odds of a winning combination look much better to a player than they actually are. In addition, the symbols can be “wild,” meaning they can replace other symbols to complete a win.

Using deployment slots allows you to differentiate app instances before swapping them into production or a staging slot. It also allows you to prewarm instances and reduces latency for HTTP-triggered workloads, as well as provides easy fallbacks in the event of an outage. You can set the name of a deployment slot to be consistent with the names of other slots that it will swap with. This name consistency prevents your code from accidentally trying to access a setting that is defined in one slot and not another.

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