On Wed, Jul 23, 2008 at 04:15:55AM -0700, Andrew Lentvorski wrote:
Yeah, he does. He bloviates about softupdates (which tries to straddle the sync/async tradeoff slightly differently) in *BSD every now and then. Linux tends to mount everything async unless you go out of your way. Unsurprisingly, when you force things in Linux to mount sync, or allow other systems to mount async, the performance numbers generally move pretty close to one another.
The default on ext3 is ordered journalling, where metadata is only updated after the data in the files is updated. As long as the underlying device properly supports write barriers, this tends to be fairly robust. Xfs depends a lot more heavily on write barriers working. David -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
