HI,
Vufind is a Discovery software that adds a discovery interface on top of your other library software like dspace, or Koha, OJS, or any knowledge management software that you use in your library. The benefit it provides is, VuFind can provide a single-window search retrieval system for all your different library software. VuFind can connect to this software using OAI-PMH protocol to fetch and harvest metadata records and then index it locally in its solr search engine.
Once that is done, You and your library users will be able to search and retrieve content from all your connected silos(Koha, Dspace, OJS). , at a single web interface, without going to individual software. Your search will also work, even if any of the connected software goes offline, in that case, Vufind will retrieve results from its local index.
It is an amazing Open Source software if you want to implement a discovery system on top of your discrete knowledge management software.
Regards
Rupinder Singh