Chapter 10: Monitoring with ELK stack

1. The process of actively gathering data.
2. By knowing usage trends, decisions such as buying more resources can be made with actual data.
3. By having data in a single place, events can be proactively detected before they can occur.
4. By knowing what is the normal behavior of a storage system, hence providing a baseline for performance.
5. When spikes are seen where they’re not supposed to be, this can mean erratic behavior.
6. Instead of going through each of the hosts in an environment, they can be checked through a single centralized location.
7. A software for data indexing and analysis.
8. Elasticsearch stores data in json format.

9. Logstash is a data processing parser that allows for data to be manipulated before being sent to Elasticsearch.
10. Kibana provides the visualisation interface for Elasticsearch, allowing for data to be easily visualized.