Big Data Quality Scoring for Structured Data Using MapReduce

In the current big data landscape, where data forms the cornerstone of myriad applications, it is crucial to establish the reliability and credibility of application outcomes through the prism of high-quality data. Nonetheless, data quality has been facing significant evaluation challenges due to the exponential increase in data volume and diversity. This paper introduces a novel big data quality scoring (BDQS) model, which is particularly designed for assessing the quality of large-scale datasets within the Hadoop MapReduce ecosystem. Unlike other models that either focus on smaller datasets or rely on sampling techniques, BDQS excels in providing comprehensive data quality assessment for substantial data sources. Specifically, BDQS identifies accuracy, completeness, consistency, timeliness, and correlation as critical dimensions of data quality, scores each dimension on a scale of 0 to 100, and derives an aggregate data quality score through binomial testing and standard normalization of these scores. This research advances a potent model for big data quality assessment and offers valuable insights for enhancing the reliability and applicability of large-scale datasets across various sectors.