Re: ORION results
Date: Fri, 29 Jan 2010 10:16:57 -0800
On Fri, Jan 29, 2010 at 8:10 AM, D'Hooge Freek <Freek.DHooge_at_uptime.be>wrote:
> I think block devices are buffered, so you would need to use raw devices
> (or open de block devices with the O_DIRECT flag).
... or use a benchmark that will obliterate the cache and let you see with real IO of the storage.
I did that once a few years ago and graphed it - it was quite interesting to
see IO's come down
and disk utilization go up and meet at a point predicted by reading the spec sheet of the drives.
Unfortunately I seem to have lost that file with the graph in it.Received on Fri Jan 29 2010 - 12:16:57 CST