Mikael Abrahamsson wrote:
On Wed, 30 Jun 2010, Roman Mamedov wrote:
This is not necessary. See the dd man page about the conv=fdatasync
switch.
You can even test with just 256 MB this way, and still get an extremely
accurate result.
You're right, for writing this is ok. For read tests it's important to
use more than ram though, to avoid doing performance testing from
block cache instead of from the actual drives.
See /proc/sys/vm/drop_caches.
--
Bill Davidsen <davidsen@xxxxxxx>
"We can't solve today's problems by using the same thinking we
used in creating them." - Einstein
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
