In view of the foregoing, the shortcomings of the prior art cache optimization techniques, the present invention provides an improved method, system, and computer program product that can optimize cache utilization. The method can further include removing an oldest request from the pending requests and adding the first request to the pending requests, and processing a newest request in the pending requests by sending a message to the second device and receiving the physical address responsive to the message. The one or more jobs specify both data to be operated on and the operations to be performed on the data at the remote system. An upper portion of the enclosure beneath the upper probe may have a larger dimension than a lower portion such that the upper portion allows propagation of waves generated by the upper probe in a predetermined frequency band while the lower portion does not substantially allow propagation of waves generated by the upper probe, in the predetermined frequency band. The generated set of N channel signals and the generated set of M channel signals may be combined to generate K channel signals.