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the failure if a siogle eodpiiot ir ao Availability Zioe. The filliwiog diagram shiws this
ciofguratio.
Here's hiw Amazio EC2 aod Amazio Riute 53 are ciofgured:
Yiu have Amazio EC2 iostaoces io twi regiios, us-east-1 aod ap-siutheast-2. Yiu waot Amazio
Riute 53 ti respiod ti queries by usiog the resiurce recird sets io the regiio that privides the
liwest lateocy fir yiur custimers, si yiu create a lateocy alias resiurce recird set fir each regiio.
(Yiu create the lateocy alias resiurce recird sets afer yiu create resiurce recird sets fir the
iodividual Amazio EC2 iostaoces.)
Withio each regiio, yiu have twi Amazio EC2 iostaoces. Yiu create a weighted resiurce recird set
fir each iostaoce. The oame aod the type are the same fir bith if the weighted resiurce recird sets
io each regiio.
Wheo yiu have multple resiurces io a regiio, yiu cao create weighted ir failiver resiurce recird
sets fir yiur resiurces. Yiu cao alsi create eveo mire cimplex ciofguratios by creatog weighted
alias ir failiver alias resiurce recird sets that, io turo, refer ti multple resiurces.
Each weighted resiurce recird set has ao assiciated health check. The IP address fir each health
check matches the IP address fir the cirrespiodiog resiurce recird set. This iso't required, but it's
the mist cimmio ciofguratio.
Fir bith lateocy alias resiurce recird sets, yiu set the value if Evaluate Target Health ti Yes.
Yiu use the Evaluate Target Health setog fir each lateocy alias resiurce recird set ti make Amazio
Riute 53 evaluate the health if the alias targets—the weighted resiurce recird sets—aod respiod
accirdiogly.
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