Volume Testing is testing the application with large volume 
of data in database.
Load Testing means Testing is Software with anticipated 
loads levels for the purpose of identifying problems in 
resourse contention and Response Times etc.
Stress Testing means test the application with anticipated 
loads to analize the maximum limit of concurrent users

laod testing  : testing the build under customer expected 
configuration with customer expected load

Stress testing  : testing the build under customer expected 
configuration with uninterval peek loads

Volume Testing  : testing the build under huse volume of 
data 

Stress / Load / Volume Test: Tests that provide a high 
degree of activity, either using boundary conditions as 
inputs or multiple copies of a program executing in 
parallel.

Load, Stress and Volume testing  are the part of 
Performence testing.

Load Testing: Load Testing gauges how efficently the 
application performs when its functions are tested with 
varying workloads.

Stress Testing:Stress Testing looks to see how well the 
software reacts and compensates when resources are low.

Volume Testing:Volume Testing tests the functional limits 
of the application by increasing the amount of data thrown 
at it untill it can no longer cope with the flow.

these 3 are different types of performance testing.
In volume testing, here we test the stability and response
time of the application by appying huge volume of data.
In load,here we test stability and response time of the
application by applying greater than the desired no of users.
In stress,here we test the stability and response time of
the application by applying less than the desired no of users.