On Wednesday 31 of March 2004 00:21, Jeff Garzik wrote:
Stephen C. Tweedie wrote:
Yep. It scares me to think what performance characteristics we'll start
seeing once that gets used everywhere it's needed, though. If every raw
or O_DIRECT write needs a flush after it, databases are going to become
very sensitive to flush performance. I guess disabling the flushing and
using disks which tell the truth about data hitting the platter is the
sane answer there.
For IDE, O_DIRECT and O_SYNC can use special "FUA" commands, which don't
return until the data is on the platter.
Do you know of any drive supporting it? I don't.