Describes the cause and action for error messages.
Error Message(English)：
number of regions
Architecting Multi-Region SaaS Solutions on AWS | AWS Partner ...
https://aws.amazon.com/blogs/apn/architecting-multi-region-saas-solutions-on-aws/
AWS Global Infrastructure: Availability Zones, Regions, Edge Locations
https://cloudacademy.com/blog/aws-global-infrastructure/
AWS Networking: A bit more about the Amazon's Cloud Backbone
https://medium.com/void-security/aws-networking-a-bit-more-about-the-amazons-cloud-backbone-3431c0eb・・・
AWS Plans To Launch A UK Region By The End Of 2016 | TechCrunch
https://techcrunch.com/2015/11/06/aws-plans-to-launch-a-uk-region-by-the-end-of-2016/
Amazon Announces the Availability of AWS Europe Stockholm Region
https://www.infoq.com/news/2018/12/aws-region-europe-stockholm
What's in a Region? | Liftr News and Cloud Index - Liftr Cloud Insights
https://liftrcloud.com/whats-in-a-region/
Expanding the AWS Cloud: Introducing the AWS US East (Ohio ...
https://www.allthingsdistributed.com/2016/10/introducing-aws-us-east-ohio-region.html
Microsoft rolls out the first availability zones within Azure regions to ...
https://www.geekwire.com/2018/microsoft-rolls-first-availability-zones-within-azure-regions-boost-cu・・・
AWS regions vs. availability zones - Lynda.com
https://www.lynda.com/Amazon-Web-Services-tutorials/AWS-regions-vs-availability-zones/609021/631474-・・・