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 the advanced detector functions

In addition to the detector functions mentioned so far, there are also a few other, more advanced functions that allow some very unique capabilities. Some of these functions are only available if the ML job is configured via the advanced job wizard or via the API.

rare

In the context of a stream of temporal information (such as a log file), the notion of something being statistically rare (occurring at a low frequency) is paradoxically both intuitive and hard to understand. If I were asked, for example, to trawl through a log file and find a rare message, I might be tempted to label the first novel message that I saw as a rare one. But what if practically every message was novel? Are they all rare? Or is nothing rare?

In order to define rarity to be useful in the context of a stream of events in time, we need to agree that the declaration of something as being rare must take into account the context in which it exists. If there...