Full-text search engine based on Apache Lucene with RESTful interface. Its advantage is high-availability, speed and scalability.
Development is done in Java and engine can be communicated via the web interface. It is free under the Apache license.
With high speed, search results or content filtering appear almost instantly. Scalability allows you to respond to server load by adding another server and spreading data and thus the load into nodes in a cluster. In case of a cluster node error, it is detected, decommissioned, and data is divided into the remaining nodes. This ensures high availability and data security.