Summary: Microsoft’s new West US 3 region will be based out of Arizona, where the company is building data centres at two separate locations. Construction is underway but it is not exactly clear when the data centres will open (we have seen an estimated of mid-2021). The two locations will enable it to launch the region with multiple availability zones – something it has not typically done to date. Microsoft is ramping up its AZs, planning to launch them in every country in which it has data centres over the next two years. First up are AZs in the Canada Central (Toronto) and Australia East (Sydney) regions, which will bring the number of Azure regions with AZs to 14, out of over 60 regions Microsoft has globally. The move speaks to the differences between how AWS and Azure have built their hyperscale platforms to this point. Microsoft built in several locations with smaller footprints and did not always have a multi-AZ architecture. This did result in certain performance issues. AWS, in contract, built in fewer geographies, but with multiple AZs and redundancy. In other words, more infrastructure in fewer locations.
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