During the initial cost analysis and, later on, the actual migration process, the following aspects had to be taken into account:

• More than 200 virtual machines owned by our client (usage analysis and optimisation);
• Changes not only in server architecture, but also in network architecture (the client’s original environment was very complex and had to stay that way, despite optimisation);
• Compliance with ISO 27001 (complete separation between production and non-production environments, as well as between different project environments).

Before the migration, we analysed the extent to which our client was using the virtual machines already in place. These data allowed us to design a brand new architecture for the target environment from scratch and optimise more than 50 machines that were scarcely used or not used at all. The new design also incorporated all the guidelines that had to be met for the architecture to meet ISO 27001 requirements.
 

In addition, we developed new scenarios for operating the client’s environments, so that the software house would only need to pay for the hours they actually used. An important step in the optimisation process involved cleaning up their storage space. Even before the migration, we changed the structures used for storing data and large numbers of files, and deleted outdated or redundant elements.