Albretch Mueller wrote: > HDDs have their internal caching mechanism and I have heard that the > Linux kernel uses RAM very effitiently, but to my understanding RAM > being only 3-4 times faster doesn't make much sense, so I may be doing > or understanding something not entirely right. > > does dd actually hit the bare metal drive or is it just reaching the > disks cache > > This is what I am consistently getting from my code doing intesive IO > on the RAM drive:
You're testing cache. Install the fio package and use that for testing. -dsr-
