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System Design Masterclass · Database Types Storage
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A large European bank wanted to move to the cloud. The appeal was obvious, elastic scaling, managed services, no more data center headaches. But then their compliance team showed up with a 47-page document explaining that certain customer financial records must reside within the country's borders, on infrastructure the bank physically controls.
So... No cloud for that data. But keeping everything on-premises meant they'd miss out on the cost savings and flexibility they were after. They were stuck between two worlds.
This is the reality for thousands of organizations. Healthcare systems that need on-prem for patient data but want cloud for analytics. Manufacturing companies that run real-time control systems on local hardware but need cloud for global reporting. Media companies with petabytes of footage on local NAS arrays but distribution through cloud CDNs.
Hybrid storage bridges these two worlds. It's not a compromise, it's a deliberate architecture that puts data where it makes the most sense, whether that's on local hardware, in the cloud, or split across both.
A hospital needs on-prem storage for regulated patient records but wants cloud for analytics and ML training. A storage gateway routes data based on policy, one API for the application, two backends behind it.