Data migration: secure, automated and reliable data transfers

Data migration can involve all types of information stored within an organization: relational databases (SQL Server, Oracle, MySQL, PostgreSQL), analytical data warehouses, office files, network shares, EDM content, business application data (CRM, ERP, HR, accounting), or even data lakes. At IT Systèmes, we cover all these perimeters, whether transferring data between internal servers, to the Cloud (Azure, AWS, GCP) or between SaaS applications. Our aim is to ensure that your information remains consistent, accessible and usable, whatever the new medium.

Both strategies offer advantages, depending on the context.

Big Bang migration involves transferring all data in a single, planned operation. It enables a rapid, seamless switchover, often carried out over a weekend or during a period of low activity.

The gradual migration, made possible by our FlexFlow tool, continuously synchronizes data between the old and new systems. This enables temporary cohabitation and step-by-step changeover (service by service, batch by batch), without double entry or disconnection. This method is ideal for multi-site organizations, mission-critical environments or large volumes of data, as it considerably reduces risks and guarantees a smooth transition.

Data security and integrity are top priorities. IT Systèmes applies a rigorous methodology that includes complete backups, pilot migrations and automated integrity checks before, during and after the switchover. Each batch of migrated data is verified by means of volumetric comparisons, hashes and consistency checks. In the event of an anomaly, automatic alerts ensure immediate correction. A roll-back plan is systematically drawn up and tested prior to production start-up, guaranteeing rapid restoration in the event of unforeseen circumstances.

Migration is an excellent opportunity to improve the quality of your data. We implement standardization, de-duplication and repository enrichment processes. Duplicates are identified and removed, formats are harmonized and business anomalies are corrected before transfer. Our tools can also be used to define a master repository (MDM) to ensure consistency between different systems. These operations ensure that only reliable and useful data is migrated, thus boosting the performance of your business applications.

IT Systèmes integrates security and regulatory compliance into every phase of the project. All personal data is processed according to the principles of the RGPD: minimization, consent, retention period and traceability.Transfers are encrypted from end to end (TLS, SSL, AES), access is strictly controlled and audit logs keep track of every action.We also ensure the separation of environments (production, test, pre-production) to avoid any risk of leakage or mixing of sensitive data. Our procedures comply with ISO 27001 standards, guaranteeing the confidentiality, integrity and availability of migrated information.

Yes, and it's one of our main areas of expertise. Whether you're moving from a local environment to Azure SQL, Amazon RDS, Google Cloud SQL or between two Cloud platforms, IT Systèmes optimizes transfers through stream compression, data partitioning and parallelized pipelines. We schedule transfers outside normal business hours (HNO) and dynamically adjust bandwidth to avoid network saturation. After the switchover, we apply a FinOps approach to keep Cloud costs under control without compromising performance.

Before each migration, we carry out a complete mapping of application dependencies. This includes exchange flows between your business tools, APIs, automation processes and external systems. Thanks to FlexFlow, we ensure synchronization between the old and new systems, to avoid any break in processing chains. Interconnected applications (CRM, ERP, BI, etc.) continue to function normally throughout the migration. End-to-end testing then validates functional consistency.

The duration depends on the volume of data, the number of systems involved and the method chosen. A simple database migration can be completed in a few days, while a multi-application migration involving several terabytes can take several weeks.
IT Systèmes plans the migration in several phases: preparation, testing, pilot migration, changeover and stabilization. The entire timetable is aligned with your business constraints to minimize the impact on production and guarantee business continuity.

We have carried out migration projects on environments ranging from a few gigabytes to several tens of terabytes, with databases containing several hundred million records.
Thanks to FlexFlow and our optimized pipelines, we can process large volumes in parallel, while maintaining perfect data consistency. Our processes include quality and performance checks to validate the success of the migration, whatever the volume to be transferred.

Once the migration has been validated, we can maintain the old system in read-only mode for a defined period, while we validate data completeness and stability. We then proceed with controlled decommissioning: final export, secure purging, regulatory archiving and deletion of obsolete accounts or accesses.
Each step is documented and validated with your business and security teams to guarantee compliance and traceability.

IT Systèmes is recognized for its technical expertise and methodological rigor.
We have carried out high-volume migrations of CRM, ERP, analytics platforms and Cloud databases, while guaranteeing security and RGPD compliance. Our FlexFlow tool enables us to synchronize data between systems in real time, avoiding duplicate data entry and ensuring reliability at every stage. Our tailor-made approach, centered on data and governance, ensures each customer a smooth, controlled and sustainable transfer.

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