In our first experiment we evaluate two methods for paging:
The reason for the somewhat surprising performance improvements is that paging to remote memory over an Ethernet interconnection network is simply faster than paging to the disk. Even though, both the disk and the Ethernet have similar data transfer rates, REMOTE_MEMORY does not suffer from seek and rotational latency as DISK does. The average page-in/page-out service time was measured to be close to 9 ms for REMOTE_MEMORY, and close to 17 ms for DISK.
Our experimental results verify than even when the network data transfer rate is as low as the disk transfer rate, the performance of REMOTE_MEMORY is significantly higher than the performance of DISK. Since architecture trends suggest that modern high speed networks provide much higher data transfer rates than modern disks, the performance improvements of REMOTE_MEMORY over disk are bound to increase.