The ELK stack contains Elasticsearch, Logstash, and Kibana. Although they've all been built to work exceptionally well together, each one is a separate open source project that is driven by the Elasticsearch company, which itself began as an enterprise search platform vendor. It has now become a full-service analytics software company, mainly because of the success of the ELK stack. Wide adoption of Elasticsearch for analytics has been the main driver of its popularity. Data constantly flows into your systems, but it can quicky get big, fat, and stale. Anybody who needs analytics-provider or user-knows this problem. As your data set grows larger, your analytics will slow up, resulting in sluggish insights. And this is likely to be a serious business problem. So, the BIG question for your big data is: how can you maintain valuable business insights?Not long ago, an epiphany ran through the industry: analytics is, in essence, a search problem that needs coupling with good visualizations. So, there was a marriage: Lucene with all its search goodness was brought together with the distributed-computing goodness that is Elasticsearch. Logstash came onto the scene to normalize all kinds of time-series data. Pop in Kibana's ultra-simple visualization tool, and you have a complete analytics tool that can rival very expensive and scalable solutions from Oracle, Palantir, Tableau, Splunk, Microsoft, and others. You, too, can play with the big boys for a lot less $$$.
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