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

Understanding temporal versus population analysis

We learned back in Chapter 1, Machine Learning for IT, that there are effectively two ways to consider something as anomalous:

  • Whether or not something changes drastically with respect to its own behavior over time
  • Whether or not something is drastically different when compared to its peers in an otherwise homogeneous population

By default, the former (which we'll simply call temporal analysis) is the mode used unless the over_field_name setting is specified in the detector config.

Population analysis can be very useful in finding outliers in a variety of important use cases. For example, perhaps we want to find machines that are logging more (or less) than similarly configured machines in the following scenarios:

  • Incorrect configuration changes that have caused more errors to suddenly occur in the log file for the system or application.
  • A system that might be compromised by malware may actually...