The Great Search Engine Debate - Elasticsearch, Solr or Vespa?

It's one of the most popular search terms on OpenSource Connections' website - Elasticsearch vs Solr, which should I use? Also, what about new contender Vespa from OATH/Yahoo?

We've gathered a group of industry experts to help you answer this question:

• Anshum Gupta, Software Engineer - Search @ Apple, Apache Lucene/Solr committer and VP of Apache Lucene
• Josh Devins, Senior Principal Engineer, Machine Learning at Elastic
• Jo Kristian Bergum, Senior Principal Software Engineer at Verizon Media working on Vespa

Moderated by Charlie Hull, Managing Consultant at OSC. Each expert will give a short pitch and then we'll open the 'floor' for questions!

Picture from Keynote Vectors by Vecteezy (https://www.vecteezy.com/free-vector/keynote)