Book Image

Essential PySpark for Scalable Data Analytics

By : Sreeram Nudurupati
Book Image

Essential PySpark for Scalable Data Analytics

By: Sreeram Nudurupati

Overview of this book

Apache Spark is a unified data analytics engine designed to process huge volumes of data quickly and efficiently. PySpark is Apache Spark's Python language API, which offers Python developers an easy-to-use scalable data analytics framework. Essential PySpark for Scalable Data Analytics starts by exploring the distributed computing paradigm and provides a high-level overview of Apache Spark. You'll begin your analytics journey with the data engineering process, learning how to perform data ingestion, cleansing, and integration at scale. This book helps you build real-time analytics pipelines that help you gain insights faster. You'll then discover methods for building cloud-based data lakes, and explore Delta Lake, which brings reliability to data lakes. The book also covers Data Lakehouse, an emerging paradigm, which combines the structure and performance of a data warehouse with the scalability of cloud-based data lakes. Later, you'll perform scalable data science and machine learning tasks using PySpark, such as data preparation, feature engineering, and model training and productionization. Finally, you'll learn ways to scale out standard Python ML libraries along with a new pandas API on top of PySpark called Koalas. By the end of this PySpark book, you'll be able to harness the power of PySpark to solve business problems.
Table of Contents (19 chapters)
1
Section 1: Data Engineering
6
Section 2: Data Science
13
Section 3: Data Analysis

Clustering using machine learning

In machine learning, clustering deals with identifying patterns or structures within uncategorized data without needing any external guidance. Clustering algorithms parse given data to identify clusters or groups with matching patterns that exist in the dataset. The result of clustering algorithms are clusters of data that can be defined as a collection of objects that are similar in a certain way. The following diagram illustrates how clustering works:

Figure 8.1 – Clustering

In the previous diagram, an uncategorized dataset is being passed through a clustering algorithm, resulting in the data being categorized into smaller clusters or groups of data, based on a data point's proximity to another data point in a two-dimensional Euclidian space.

Thus, the clustering algorithm groups data based on the Euclidean distance between the data on a two-dimensional plane. Clustering algorithms consider the Euclidean distance...