The IRS processed over 115 million individual tax returns in 2018. Atlanta’s Hartsfield-Jackson airport handled nearly 104 million passengers in 2017. Facebook has more than 300 million photos uploaded a day. Apple sold more than 216 million iPhones in 2017. The amount of data the world generates every day is staggering. It used to be that as the data increased, so did the processors to process it. If your app wasn’t fast enough, you could wait a year and buy a new server, and all was fine.
11. Scaling and Tuning
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