The case study \u201esafe data migration\u201c does not start with a technical detail, but with a concrete business risk: a medium-sized trading company could not afford any longer outages of its webshop, inventory management system and document archive. The existing server environment had grown over the years, was poorly documented and reached its limits during peak loads. At the same time, sensitive customer and business data were to be operated in a German data center in the future.<\/p>\n
The task was clear: The infrastructure had to be moved into a managed, high-performance environment \u2013 without data loss, without uncontrolled interruptions, and with a reliable fallback plan. Especially for SMEs, this is not an exceptional case. Many companies postpone a necessary migration because the risks appear difficult to assess. In fact, however, not only the technology used determines success, but above all the planning, responsibility, and monitoring of the entire process.<\/p>\n
The company operated multiple virtual systems with different service providers. The webshop was connected to the ERP system, product data was automatically imported, and employees accessed internal applications via VPN. Additionally, email mailboxes, databases, backup jobs, and interfaces to shipping service providers were running on different instances.<\/p>\n
The problem was not just in the number of systems. Dependencies were sometimes the result of historical events and were only known to individual employees. An uncoordinated migration could have resulted in orders not being processed, inventory levels being incorrectly displayed, or emails not being delivered. Therefore, the management decided that a cost-effective standard migration without personal technical support was not an option.<\/p>\n
Together with the IT manager, the actual inventory was first compiled. This included operating systems, applications, databases, IP addresses, DNS entries, storage requirements, access rights, certificates, and planned maintenance windows. Equally important was the question of which systems were truly business-critical and which could be migrated at a later date.<\/p>\n
A secure data migration does not begin with copying data. Before the first transfer, a migration plan was created that combined technical and organizational requirements. It defined responsibilities, timeframes, verification steps, and escalation routes. This ensured that each involved person knew who would decide on any deviations and how quickly a response needed to be made.<\/p>\n
Special attention was given to the webshop\u2019s database. It was continuously updated with orders, customer accounts and payment status. A one-time export would therefore not have been sufficient. First, a complete initial copy was created and checked in the new environment. Shortly before the planned switchover, a second, incremental comparison was then carried out. Only after that was write access for a strictly limited maintenance window controlled.<\/p>\n
The protection of transmission paths was also part of the concept. Data were transmitted encrypted, administrative access to clearly defined individuals was restricted, and access was arranged according to the principle of least necessary authorization. Logs documented when data were transmitted, reviewed, and released. This not only creates security in the ongoing project, but also provides traceability for internal audits and data protection requirements.<\/p>\n