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

Multi-bucket anomalies

Almost everything that we've studied so far with anomalies being generated by Elastic ML's anomaly detection jobs has been with respect to looking at a specific anomaly being raised at a specific time, but quantized at the interval of bucket_span. However, we can certainly have situations in which a particular observation within a bucket span may not be that unusual, but an extended window of time, taken collectively together, might be more significantly unusual than any single observation. Let's see an example.

Multi-bucket anomaly example

First shown in the example in Chapter 3, Anomaly Detection, in Figure 3.17, we repeat the figure here to show how multi-bucket anomalies exhibit themselves in the Elastic ML UI:

Figure 5.23 – Multi-bucket anomalies first shown in Chapter 3

As we discussed in Chapter 3, Anomaly Detection, multi-bucket anomalies are designated with a different symbol in the UI (a cross instead...