Implementation of subset query form scalar in collections searching feature inside digital library system (Case study library of research center for biology cibinong bogor)

Research Center for Biology LIPI as research institutions have made use of ICT in improving the function of libraries with digital library system named BIOLIB. But because it was his application biolib many features that are not working properly. Therefore, Research Center for Biology require a new digital library system that can search a collection, booking reference, report the results of a reservation, keyword search statistics, data migration feature to the benefit plan using the new system and the system is integrated with library management information system. Data collection Puslit biology library had about 80,000 data records with big data, it's require to optimization. One of methods optimization is Cost Based models subset query. Methods subset of queries in the form of scalar successfully implemented into the search feature collections in the digital library system.