Book Image

Machine Learning with the Elastic Stack - Second Edition

By : Rich Collier, Camilla Montonen, Bahaaldine Azarmi
5 (1)
Book Image

Machine Learning with the Elastic Stack - Second Edition

5 (1)
By: Rich Collier, Camilla Montonen, Bahaaldine Azarmi

Overview of this book

Elastic Stack, previously known as the ELK stack, is a log analysis solution that helps users ingest, process, and analyze search data effectively. With the addition of machine learning, a key commercial feature, the Elastic Stack makes this process even more efficient. This updated second edition of Machine Learning with the Elastic Stack provides a comprehensive overview of Elastic Stack's machine learning features for both time series data analysis as well as for classification, regression, and outlier detection. The book starts by explaining machine learning concepts in an intuitive way. You'll then perform time series analysis on different types of data, such as log files, network flows, application metrics, and financial data. As you progress through the chapters, you'll deploy machine learning within Elastic Stack for logging, security, and metrics. Finally, you'll discover how data frame analysis opens up a whole new set of use cases that machine learning can help you with. By the end of this Elastic Stack book, you'll have hands-on machine learning and Elastic Stack experience, along with the knowledge you need to incorporate machine learning in your distributed search and data analysis platform.
Table of Contents (19 chapters)
1
Section 1 – Getting Started with Machine Learning with Elastic Stack
4
Section 2 – Time Series Analysis – Anomaly Detection and Forecasting
11
Section 3 – Data Frame Analysis

Detecting changes in metric values

Obviously, not all data being emitted from systems will be text or categorical in nature—a vast amount of it is numerical. Detecting changes in metric values over time is perfectly suited for anomaly detection because, as mentioned in Chapter 1, Machine Learning for IT, the historical paradigm of alerting on exceptions in numerical values via static thresholds has been troublesome for decades. Let's explore all that Elastic ML has to offer with respect to the functions that help you detect changes in numerical fields in your data.

Metric functions

Metric functions operate on numerical fields and return numerical values. They are perhaps the easiest of the detector functions to understand.

min, max, mean, median, and metric

These functions do exactly as you would expect: they return the minimum, maximum, average/mean, and median of all of the numerical observations for the field of interest in the bucket span.

The metric...