Testing by processing the same (or at least closely comparable) test workload against both the existing and new versions of a product, then comparing results.
A test where the existing and new systems are operated in parallel and the before-and-after results are compared. A parallel test
is also called a volume test
because of the large volume of test data typically used. (Others use the term ?volume test
? instead to mean a performance test
, which is not the same as a parallel test.)
A test in a parallel processing environment, also called multi-threading or concurrent processing. This is not the same as parallel processing in definitions above.