The Doppler Quarterly Spring 2019 - Page 79

• Read-only scenarios – Read-only copies are created in a similar manner to transactional ones, usually for performance reasons in systems doing heavy analy- sis. In most cases, applications can fall back to the active master system if the read-only system is not available. Security and Privacy Considerations One of the critical pieces that is often not addressed, or even considered, when implementing replication/entangle- ment scenarios, revolves around data security and privacy. When data is replicated from one environment to another, the security requirements surrounding that data must fol- low it. Many times, people assume security constraints are set up identically in both environments, but this is not nec- essarily the case. A second challenge in replication revolves around data pri- vacy issues. As an organization, you are responsible for any data passing through/replicated into your environment. A simple example is the GDPR “right to be forgotten” rule. If your system has personal information about an individual who has requested to be removed from your system, that means their data must be deleted from any and all systems where it resides. If their information is entangled through- out your environment, you must make sure you have identi- fied all those connections in order to remain compliant. The best way to address both these considerations is to have a comprehensive data governance process in place. With copies of data moving throughout your system, it is critical to know what data you have and where you have it. In many organizations, data replications and entanglements have grown organically, and without good governance, data can be forgotten, putting the organization at risk. No Technology Negates the Need for Good Design and Planning In the rapidly changing world of digital disruption, the ever growing number of technology tools available, along with the pressure to quickly implement new solutions, makes it easy to fall into a “ready, fire, aim” approach. Hybrid cloud and huge volumes of data provide tremendous opportuni- ties to add value to your business. But the need for speed does not negate the need for good design and planning. We as technologists have a responsibility to make sure we understand where the entanglements of data are, what the impacts are and what the requirements are to replicate that information to the right place, at the right time, taking into account performance, cost, security and privacy. Only then can we truly provide lasting and scalable business value. SPRING 2019 | THE DOPPLER | 77