Storage efficiency of LOB structures for free RDBMSs on example of postgreSQL and oracle platforms

Abstract

The article is a study upon storage efficiency of LOB structures for systems consisting of PostgreSQL or Oracle relational database management systems. Despite the fact that recently several NoSQL DBMS concepts were born (in particular document-oriented or key-value), relational databases still do not lose their popularity. The main content is focused on sparse data such as XML or base64 encoded data that stored in raw form consume significant volume of data storage. Studies cover both performance (data volume stored per unit of time) and savings (ability to save data storage) aspects.