DDH vertical search engine commercial version is the only vertical search engine system that can be commercially operated in the Internet at present. It is a network information integration system developed by JAVA language and can run in large-scale clusters.DDH integrates Nutch (open source search engine system), UCI (web information extraction system) and SOLR (enterprise search application server).DDH vertical search engine system is one of the top vertical search engine systems in terms of scalability, system performance and stability.
