Deploying a software image from a source data-processing system on target data-processing entities of a target data-processing system, the software image including memory blocks being individually accessible, with a predefined subset of the memory blocks defining a bootstrap module. The deploying includes downloading the bootstrap module onto a main one of the target data-processing entities from the source data-processing system, booting the main target data-processing entity from the bootstrap module thereby loading a streaming driver in the bootstrap module, and serving each request of accessing a selected memory block of the software image on the main data-processing entity by the streaming driver.