Ok, I finally got a couple of tests done against CVS from Aug 3, 2005.
I'm not sure if I'm showing anything insightful though. I've learned
that fdatasync and O_DSYNC are simply fsync and O_SYNC respectively on
Linux, which you guys may have already known. There appears to be a
fair performance decrease in using open_sync. Just to double check, am
I correct in understanding only open_sync uses O_DIRECT?
fdatasync
http://www.testing.osdl.org/projects/dbt2dev/results/dev4-015/38/
5462 notpm
open_sync
http://www.testing.osdl.org/projects/dbt2dev/results/dev4-015/40/
4860 notpm
Mark