WOW! Those differences are crazy! > > Please - I know benchmarking takes a lot of time - but could you check > something: the behavior those fs have at what time they flush data from > cache to disk is very different. Have you made sure that you measured > the time it really needs? I mean the difference between: > > $ sync; time cp source dest > and > $ sync; time (cp source dest; sync) > > Only the last measures somewhat correctly. >
I had noticed that there was, say, 5 seconds of disk activity after the cp command complete which I assumed was buffers getting flushed, but 5 seconds didnt seem that significant overall. I will run the tests as you suggest and post back. Do you think btrfs (with or without compression) would be faster than reiser? If so I will try that as well.
