The aggregation issue that surrounds putting disparate data together into a Big Data system, therefore, creating relationships among data sets that did not previously exist, is now a major governance and privacy concern for larger organizations. I have seen several organizations, especially within the government and health care industries, needing to step back and address these issues before full implementation. They are finding their data, once assembled into the Big Data components, is now being reclassified at a higher security level due to the legal and external requirements of governmental agencies and liability concerns. This is changing the data querying efforts and constructs allowed for uses and analysis of the data.
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