[throwaway167]

> Running DB in "b" zone and your only server in "a"

There must be use cases for this, but I lack imagination. Cost? But not cost?

[jakozaur]

Defaults. Either as a code or using click ops.

Many companies run servers without considering AZ. Then you can get the "best" of the worlds:

1. Your service is down if either of AZs gets hiccups.

2. You pay network charges and latency cost.

[sokoloff]

I can't see a reason to do this intentionally within a single account, but use cases with multiple accounts should be aware that what AZ has ID us-east-1a in Account 1 is not necessarily the same AZ that has the ID us-east-1a in Account 2.

https://docs.aws.amazon.com/ram/latest/userguide/working-wit...

[QuadmasterXLII]

Cost, unlimited cost- but no cost.