We have chosen Elastic Stack as our indexed data store. Even though this is a strong technology choice in this space, we do have options which could be considered and chosen as the case may be. One main contender in this space is Apache Solr and we will discuss that in brief here.
Other options
Apache Solr
Apache Solr is the popular, blazing-fast, open source enterprise search platform built on Apache Lucene. Solr is a standalone enterprise search server with a REST-like API. You put documents in it (called "indexing") via JSON, XML, CSV or binary over HTTP. You query it via HTTP GET and receive JSON, XML, CSV or binary results.
The features at http://lucene.apache.org/solr/features.html are listed here, making it an...