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Big data is data sets that are so voluminous and complex that traditional data processing application software are inadequate to deal with them.Big data challenges include capturing data, data storage, data analysis, search, sharing, transfer, visualization, querying, updating and information privacy.Relational database management systems and desktop statistics- and visualization-packages often have difficulty handling big data.The work may require "massively parallel software running on tens, hundreds, or even thousands of servers".What counts as "big data" varies depending on the capabilities of the users and their tools, and expanding capabilities make big data a moving target."For some organizations, facing hundreds of gigabytes of data for the first time may trigger a need to reconsider data management options.This enables quick segregation of data into the data lake, thereby reducing the overhead time.Some but not all MPP relational databases have the ability to store and manage petabytes of data.

Hard disk drives were 2.5GB in 1991 so the definition of big data continuously evolves according to Kryder's Law.

A distributed parallel architecture distributes data across multiple servers; these parallel execution environments can dramatically improve data processing speeds.

This type of architecture inserts data into a parallel DBMS, which implements the use of Map Reduce and Hadoop frameworks.

For many years, Winter Corp published a largest database report.

Teradata Corporation in 1984 marketed the parallel processing DBC 1012 system.

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