1. In a network comprising a plurality of servers, a plurality of clients and a plurality of proxies which handle data transfers between said clients and said servers, a method for responding to a first client request for data from one of said clients and a second client request for data from another of said clients comprising the steps of: receiving said first client request and said second client request; determining that said first and second client requests are for respective first and second transformations of data; dividing said plurality of proxies into a plurality of sets of one or more proxies; preassigning each set to perform a different one of a plurality of transformations; directing said first request for said first client transformation to one of said sets based on said preassigning; directing said second request for said second client transformation to another of said sets based on said preassigning; and providing said first and second client transformations.