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Part of the success of modern application is targeting it globally – all over the world. It isn’t possible to run such application on a single machine, even with most powerful hardware.

Definitions like Distributed computing or Reactive applications were born in the process of IT globalization. Nowadays, applications run on multiple virtual machines distributed over multiple physical machines which are often spread around the world. Such applications aren’t easy to maintain.

Every service has different hardware requirements and dependencies, so it has to be deployed and upgraded continuously. In addition each machine has to be configured in such a way that allows communication within the cluster and with external services. Although Devops have helpful deployment tools like Chef, Puppet or Ansible, these tasks still aren’t easy, trust me. Read more