Messages in this thread | | | Date | Tue, 30 Mar 2004 17:38:40 -0500 | From | Jeff Garzik <> | Subject | Re: [PATCH] barrier patch set |
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Bartlomiej Zolnierkiewicz wrote: > 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.
Newer SATAs do...
Jeff
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