Cube build time

[cognos05]

Hi ,

Iam using the below script to buil cognos ransformer cubes.

cd "C:\Program Files (x86)\ibm\cognos\c11\bin"
cogtr.exe -n2 -c -g -s -m"E:\Cognos Cubes\DWH Agency Sales Cube\Model\DWH Agency Sales Daily.mdl"

I am rebuilding the cubes in two similar servers with same data and one serer completes cube buil in 20 mins and other takes 35 minutes.

Is there any specific command I can use the cube build process to say build parallely if there is more than 1 cube building on the same server at similar time.