IBM blade server abysmal disk write performances

[Adrian Chadd]

Hi,

You're only doing one IO at the end. That's just plain silly. There's
all kinds of overhead that could show up, that would be amortized over
doing many IOs.

You should also realise that the raw disk IO on Linux is by default
buffered, so you're hitting the buffer cache. The results aren't going
to match, not unless you exhaust physical memory and start falling
behind on disk IO. At that point you'll see what the fuss is about.



Adrian