Discussion
State whether the following is true or false.
Placing chatty components in the same availability zone can reduce both latency and cost.
Answer: A
Correct answer: True
Two components that exchange a great deal of traffic benefit twice from sharing a zone: the round trip is shorter, since the traffic stays within one data centre campus, and no cross-zone transfer charge applies. It is a real optimisation for chatty pairs such as an application server and its cache - and it is also a reduction in resilience, which the next item addresses.
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