Scaling the hybrid cloud horizontally

After being derided as "unpure" by cloud enthusiast when the idea was first presented, we can now safely say that the hybrid cloud is here to stay. The mix of dynamic requirements within the enterprise related to government/industry regulations, security and performance require a more flexible environment than the public cloud can offer. So what does a hybrid cloud actually mean? A hybrid cloud is a composition of a private cloud and public cloud. There are two types of scaling patterns when using a hybrid cloud: vertical and horizontal.


A vertical scaling pattern is the better-known scenario. This pattern spreads different components of one application across different clouds. An example of this would be where one part of an application, typically the data, is kept private, while another part is run in the cloud, such as the web front end or calculations being made on the data.


A horizontal hybrid cloud scaling pattern, on the other hand, spreads different instances of applications across different clouds. In this scenario, enterprises develop their own applications and run them in multiple environments, some on-prem, some in the cloud. Developers run it in a test environment, testers test it in a QA environment, and users access the version that has been deployed to the production environment. Each of these environments can be in the cloud or on-prem depending on the security, performance, flexibility and scalability requirements of that environment.
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