In simple term, Volume Testing is the test process where the system is subjected to large volumes of data
Volume Testing is done against the efficiency of the application. Large data/database is processed through the application under testing in order to check the extreme limitations of the system
Volume Testing, as its name implies, is testing that purposely subjects a system (both hardware and software) to a series of tests where the volume of data being processed is the subject of the test. Such systems can be transactions processing systems capturing real time sales or could be database updates and or data retrieval
Volume testing will seek to verify the physical and logical limits to a system’s capacity and ascertain whether such limits are acceptable to meet the projected capacity of the organization’s business processing