Book Image

Improving Your Splunk Skills

By : James D. Miller, Paul R. Johnson, Josh Diakun, Derek Mock
Book Image

Improving Your Splunk Skills

By: James D. Miller, Paul R. Johnson, Josh Diakun, Derek Mock

Overview of this book

Splunk makes it easy for you to take control of your data and drive your business with the cutting edge of operational intelligence and business analytics. Through this Learning Path, you'll implement new services and utilize them to quickly and efficiently process machine-generated big data. You'll begin with an introduction to the new features, improvements, and offerings of Splunk 7. You'll learn to efficiently use wildcards and modify your search to make it faster. You'll learn how to enhance your applications by using XML dashboards and configuring and extending Splunk. You'll also find step-by-step demonstrations that'll walk you through building an operational intelligence application. As you progress, you'll explore data models and pivots to extend your intelligence capabilities. By the end of this Learning Path, you'll have the skills and confidence to implement various Splunk services in your projects. This Learning Path includes content from the following Packt products: Implementing Splunk 7 - Third Edition by James Miller Splunk Operational Intelligence Cookbook - Third Edition by Paul R Johnson, Josh Diakun, et al
Table of Contents (21 chapters)
Title Page

Reducing summary index size

If the saved search populating a summary index produces too many results, the summary index is less effective at speeding up searches. This usually occurs because one or more of the fields used for grouping has more unique values than expected.

One common example of a field that can have many unique values is the URL in a web access log. The number of URL values might increase in instances where:

  • The URL contains a session ID
  • The URL contains search terms
  • Hackers are throwing URLs at your site trying to break in
  • Your security team runs tools looking for vulnerabilities

On top of this, multiple URLs can represent exactly the same resource, as follows:

  • /home/index.html
  • /home/
  • /home/index.html?a=b
  • /home/?a=b

We will cover a few approaches to flatten these values. These are just examples and ideas, and your particular case may require a different approach...