Elasticsearch 7 and Elastic Stack - In Depth and Hands On! - Parsing and Filtering Logstash with Grok

The video tutorial explains how to work with structured and unstructured data using Logstash's Grok filter. It covers the basics of Grok patterns, their application in parsing log data, and how to handle parse failures. The tutorial includes hands-on exercises for creating Logstash configuration files and demonstrates using multiple Grok filters for complex log files.

Explain the concept of greedy data in the context of grok filters.

What is the purpose of the GROK debugger tool?

What happens when a log line does not match any defined grok patterns?

How can multiple grok filters be used to parse complex log files?