19 May
2010
19 May
'10
3:19 p.m.
On 05/19/2010 06:14 AM, John Doe wrote:
From: Matt Keatingkeatster@gmail.com
I don't usually use iozone (I usually use bonnie++) so take this with a grain of salt, but those speed look suspiciously like cache speeds. Bump the size (-s parameter) up to twice your real RAM size.
Will give that a try - 16gb file incoming
Or maybe do a: sync; echo 3> /proc/sys/vm/drop_caches between the 2 tests...?
It wouldn't help. The problem is the tests were using file sizes small enough to easily fit completely into the system caches. So you end up benchmarking the performance of the I/O system caches - not the drives themselves.
--
Benjamin Franz