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Search Under the Hood

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Course Description

This eLearning course gives students additional insight into how Splunk processes searches. Students will learn about Splunk architecture, how components of a search are broken down and distributed across the pipeline, and how to troubleshoot searches when results are not returning as expected.

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eLearning

Learn at your own pace through these free, video-only online courses accessible anytime, anywhere.

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eLearning with Labs

The best of both delivery methods. Self-paced eLearning videos accessible anytime, anywhere, plus access to the interactive lab environment to sharpen your skills.

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Course Prerequisites

Recommended:

  • Intro to Splunk eLearning course

Course Topics

  • Understanding Splunk architecture
  • Understanding how search terms are tokenized
  • Using streaming and non-streaming commands
  • Using troubleshooting commands and functions

Course Objectives
 

Topic 1 – Investigating Searches
  • Use the Search Job Inspector to examine how a search was processed and troubleshoot performance
  • Use SPL commenting to help identify and isolate problems

 

Topic 2 – Splunk Architecture
  • Understand the role of search heads, indexers, and forwarders in a Splunk deployment
  • Understand how the components of a bucket (.tsidx and journal.gz files) are used
  • Understand how bloom filters are used to improve search speed

 

Topic 3 – Streaming and Non-Streaming Commands
  • Describe the parts of a search string
  • Understand the use of centralized vs. distributable commands
  • Create more efficient searches

 

Topic 4 – Breakers and Segmentation
  • Understand how segmenters are used in Splunk
  • Use lispy to reduce the number of events read from disk
     

 

Topic 5 – Commands and Functions for Troubleshooting
  • Using the fieldsummary command
  • Using the makeresults command
  • Using information functions with the eval command
    • the isnull function
    • the typeof function
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