How counting is done with big data
https://towardsdatascience.com/big-data-with-sketchy-structures-part-1-the-count-min-sketch-b73fb3a33e2a https://towardsdatascience.com/big-data-with-sketchy-structures-part-2-hyperloglog-and-bloom-filters-73b1c4a2e6ad
https://hub.packtpub.com/common-big-data-design-patterns/ https://www.innoarchitech.com/blog/scalable-software-big-data-analytics-architecture-architectural-design-patterns https://azure.microsoft.com/en-in/blog/the-emerging-big-data-architectural-pattern/ https://www.datasciencecentral.com/profiles/blogs/11-core-big-data-workload-design-patterns