Virtual DBSight Site
From DBSight Full-Text Search Engine/Platform Wiki
What's Virtual DBSight Index?
Virtual index is for users to search multiple indexes at the same time. The virtual index can even search on multiple DBSight instances, multiple indexes, and multiple templates. This is an extremely powerful tool to search a lot of indexes.
How to create one?
From the dashboard page, click "Create Index", and choose the option for Virtual Index. After creation, be sure to "Select Data", to choose which server, index, template, or even the starting rendering file(usually main.ftl).