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Simplifying Data Engineering and Analytics with Delta

Simplifying Data Engineering and Analytics with Delta

By : Anindita Mahapatra
4.9 (15)
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Simplifying Data Engineering and Analytics with Delta

Simplifying Data Engineering and Analytics with Delta

4.9 (15)
By: Anindita Mahapatra

Overview of this book

Delta helps you generate reliable insights at scale and simplifies architecture around data pipelines, allowing you to focus primarily on refining the use cases being worked on. This is especially important when you consider that existing architecture is frequently reused for new use cases. In this book, you’ll learn about the principles of distributed computing, data modeling techniques, and big data design patterns and templates that help solve end-to-end data flow problems for common scenarios and are reusable across use cases and industry verticals. You’ll also learn how to recover from errors and the best practices around handling structured, semi-structured, and unstructured data using Delta. After that, you’ll get to grips with features such as ACID transactions on big data, disciplined schema evolution, time travel to help rewind a dataset to a different time or version, and unified batch and streaming capabilities that will help you build agile and robust data products. By the end of this Delta book, you’ll be able to use Delta as the foundational block for creating analytics-ready data that fuels all AI/BI use cases.
Table of Contents (18 chapters)
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1
Section 1 – Introduction to Delta Lake and Data Engineering Principles
5
Section 2 – End-to-End Process of Building Delta Pipelines
13
Section 3 – Operationalizing and Productionalizing Delta Pipelines

Handling bias and variance in data

We encounter several types of errors in insight generation when using an analytic function. They typically fall into three main categories – that is, bias, variance, and irreducible errors:

  • Bias is defined as the difference between the "predicted" and "expected" values of an analytic function. The ML algorithm is unable to capture the true relationship between the features and the target. An example of this is model underfitting.
  • Variance is the result of the model making too many assumptions. An example of this is model overfitting, which means that the training is not generalized enough and should have stopped earlier.
  • Irreducible errors are random and not directly controlled by the model.

Increasing bias reduces variance and vice versa. In other words, they are indirectly proportional. So, the total prediction error is the sum of all these errors. This can be depicted as follows:

Prediction error...

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