The particular challenges faced during a migration often depend on the reason for carrying out the migration. Reasons for a migration include consolidating to a smaller data center to save money, power and cooling, expanding into a larger center after a merger, acquisition or business growth, or moving into a site with more modern technology.
Downtime is one of the primary concerns when planning a data center migration. More often than not, an organization will want its systems to be operational 24/7. It is possible to keep a system up and running during a migration, but that kind of uptime can come with a heftier price tag.
When creating a data center migration plan, it is important to keep in mind the complexity involved. Migrations include hardware, software, storage, network equipment, cooling systems, power supplies and data, and it's important to have a detailed inventory of what will be affected by the migration. Not having a full understanding of what is being migrated can drag the process out, which is why it is so important to ask the right questions during planning. Before launching into a migration, an organization should know each step that will be required, what resources are needed, the full size and scope of the migration and their budget. Asking these questions will minimize unpleasant surprises along the way.
Once the data center migration is complete, post-migration testing is a must. Also, managers should update data center procedures accordingly, in a way that is particular to the new system.
The time, resources and planning for a data center migration are done to protect an organization and mitigate risk.