Читать книгу CompTIA Cloud+ Study Guide - Ben Piper, David Higby Clinton - Страница 58

Organizations that blindly decide to move some of their IT infrastructure to the cloud are sometimes met with an unpleasant surprise when they find out how difficult and expensive it can be. It's not necessarily that the cloud is prohibitively expensive. The surprise comes from failing to understand the dependencies that exist among different IT resources in the data center. When one IT resource moves from the data center to the cloud, it usually has to drag a few other resources with it. For example, moving a database-backed application probably requires moving the database, which might be quite large. Naturally, whoever manages that database is going to have to back it up, so backups will have to be stored in the cloud as well.

Hence, you must have a very clear and detailed understanding of what it is that you are actually moving. This means having updated documentation that reflects all aspects of your operations. To perform a migration, you must know exactly which applications you are running, their dependencies, along with any storage, network, operating system, processing, memory, and any other relevant requirements. The more detailed assessment of your current operations, the better equipped you are to decide whether it makes sense to move to a cloud-based model.