Two computing devices utilizing remote direct memory access to exchange digital data across a computer network can utilize existing registered memory and can transmit the digital data in slices, one after another while simultaneously registering a larger quantity of memory and, when complete, the rest of the digital data can be transmitted as a single block. Completion of the memory registration triggers a notification comprising a token, providing the sending computing device with direct access to the registered memory on the receiving computing device, and further a quantity of the digital data that has already been properly received via the slices. On the sending computing device, the registered memory is that from which the digital data is being sliced, and, on the receiving computing device, that into which the digital data is being reassembled from the slices.
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