1. A system for direct communication between hardware accelerators in a computer cluster, comprising: a first hardware accelerator in a first computer of a computer cluster; and a second hardware accelerator in a second computer of the computer cluster; wherein the first computer and the second computer differ from one another and are designed to be able to communicate remotely via a network, and wherein the first accelerator is designed to request data from the second accelerator and/or to retrieve data by means of a direct memory access to a global address space on the second computer and to communicate data to the second computer.