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There are a variety of reasons why companies need data centers migration. Such as regulatory requirements, mergers and acquisitions, space constraints, or reduced overheads. It is a common event that the business moves from one data center to another, or from one data center to the cloud. However, how to successfully migrate data centers is very challenging.
The process involves complex issues, such as redeploy applications, infrastructure software, and sometimes even hardware, and all that they depend on. In the migration process, there are two basic requirements: do not lose any data, nor unexpected downtime.

To achieve these requirements is easier said than done. For example, some applications can communicate through specific connections that have problems when they are far from the new location. In some cases, security and regulatory issues prevent application migration. In other respects, the information on existing IT assets may not be up to date, so it is impossible to predict the impact of some of the hardware or infrastructure elements that have been decommissioned.
The benefits of successful migration of data centers are very obvious. Enterprises can gain greater benefits from new improvements = performance, more efficient management, and migration system operations. Here are six rules to help and guide the successful migration of data centers.
Evaluate existing settings
Corporate knowledge of IT assets is often incomplete. That knowledge is even further down as its assets become obsolete. As time goes on, business process reports, training manuals and internal documents may be lost, while other documents are rarely maintained.
In addition, to ensure that migration is carried out as smoothly as possible, enterprises need to thoroughly check existing data centers. If these information gaps are not handled properly, they will begin to migrate and problems will arise.
Keep in mind that each application is likely to have a variety of relationships and dependencies with other applications and infrastructure elements. The network trace tool helps the staff understand the relationships and re - discover which components are communicating with other components.
However, in the months before the enterprise plans to migrate data centers, the use of these tools makes no sense, as some systems communicate only once a few months or even once a year. So start as soon as possible, and build a comprehensive panorama of data center work before migration.
Select the best migration method for each application
Each application has several different migration methods to choose from, depending on what technology the application is running on. The "promotion and transfer" method refers to physically moving hardware from one location to another, which is suitable for applications that use older technologies.
Other options for applications running on newer technologies include restoring the machine image, copying the virtual machine to the new data center, reinstalling the application, and migrating data. Once the enterprise chooses the most relevant migration method, you need to figure out how many tests the process requires.
It is worthwhile to perform tests and rigorous tests on applications that are particularly important or critical tasks.
Test migration for higher priority applications
When you move a critical task application, it is meaningful to try intensive testing after migration. If an application is less important, such as tracking an employee's birthday application, there is no need to have a trial and test. The decision ultimately depends on how important the system is to the business and what role the technology plays.
High priority applications usually contain sensitive data. To avoid downtime or data loss during migration, companies need to schedule regular backups and develop a solid pre migration rollback plan just in case. Try the migration test method and identify any issues before the migration of the damage activity.
Consider old traditional systems
The IT system may be obsolete, but that doesn't mean it's redundant. Many IT systems still provide good service to enterprises after decades of installation. The challenge for businesses is to move traditional legacy systems to the cloud or new data centers, which is not a simple process.
For example, if an application running the enterprise in the 1990s VAX small computer, and will transfer to another traditional data center, then the method of upgrade and transfer "is a feasible solution. However, if you move your application to the cloud, you'll need to migrate it to the VAX emulator before migrating. Otherwise, the enterprise must decide whether to completely overwrite, replace, or delete the application.