Andrew Stevens wrote:
>
> Jim Buzbee wrote:
> >
> > Alan Cox wrote:
> > >
> > > > [EMAIL PROTECTED] wrote:
> > > > > - Put bluntly: ext2 is not good for video capture
> > > >
> > > > Mount the partition with the synchronous option.
> > >
> > > uggh. For 2.2 use O_SYNC so you just slow down the video writer thread and
> > > stream the I/O, for 2.4 make use of O_DIRECT to raw device if possible for
> > > even better behaviour
>
> Not sure I understand how this would help. Certainly synchronous
> makes little difference. The problem is the capture thread being
> starved due to large peaks in disk acitivty caused by internal FS
> house-keeping around file closure / file inactivity on big files.
Those peaks are due to buffering. In a synchronous mode, all I/O
completes when requested... rather than waiting for files to close or
file inactivity.
Chris
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