Heklo, I have tried haar training on my single pc.But it is taking a whole lot of time. I am at Stage 3 and though the training is going on since 3 days but the cursor is still blinking on 0% that means it may take a month to finish this stage. I have also read that on a research paper that training for the robust face took 24 hrs in 30+ clusters. Is that so, how can I do training faster way? or, is there some useful utility in opencv for running this application in cluster?? I have took 4925 negative samples and 2462 positive samples. Regards