Originally Posted by Artikbot
The servers were wired together along 1km^2 of land with 8.4Gb/s optical interfaces with PCI Express LAN cards.
It performed incredibly well, don't know up to what level, but performance was more than 10x the performance of the virtual memory using only system drives.
So yes, it works. Not up to a physical RAM level, but sure it does work WAY better than regular virtual memory on a single system disk. And if you swap HDDs for SDDs, performance will be way better.
My point wasn't that it wouldn't work, but that there is no way (that I can see) that you can ever hope to get 73% of the performance of DDR2 over any kind of SAN. The latency you get from RAM is on the order of a few nanoseconds, but with a SAN your latency will be 2 or 3 orders of magnitude greater, especially over longer distances. Even if you go to SSD(s) you will still have the latency from the network link coming in to play, especially if you have to chain things together through a switch or two. A single local SSD will likely be faster for virtual memory usage.