Nathan Straz wrote:
> On Tue, Dec 04, 2001 at 06:14:09PM +0100, Roy Sigurd Karlsbakk wrote:
> > On Tue, 4 Dec 2001, Ralf G. R. Bergs wrote:
> > > On Tue, 4 Dec 2001 17:45:35 +0100 (CET), Roy Sigurd Karlsbakk wrote:
> > >
> > > >I'm trying to make a real-time filesystem
> > >
> > > This is from http://oss.sgi.com/projects/xfs/102_caveats.html
> > >
> > > > Realtime volumes not implemented
> > > >
> > > > Realtime volumes are not yet tested in XFS Linux and should not be used.
> > >
> > > I guess that pretty much says it all... :-)
> > ok.. bummer!
> > I really need to increase some sort of chunk size dramatically. Do you
> > know any other way of doing this? I also want the log somewhere else, like
> > on a separate spindle. I may be able to use ReiserFS to do this, but I
> > don't know yet.
> Realtime subvolumes is on my things to test before the next release. I
> don't know when it will get done, but it will take a bit of test
> development to do it. Realtime files on XFS require an ioctl, so apps
> will need some work to support them.
Now I'm curious, what's the basic purpose and performance difference
between a real-time filesystem and a "normal" filesystem? Is it some
sort of caching behavior change more suitable for streaming media?
D. Stimits, stimits@xxxxxxxxxx
> To create an external log, you should use something like:
> mkfs.xfs -l logdev=/dev/sdb1,size=10000b /dev/sda1
> Where /dev/sda1 is your XFS partition and /dev/sdb1 is your log
> partition on a separate spindle. Adjust size= to fit your application.
> As far as "chunk size" is concerned, you probably want to look at
> something like "-d sunit=,swidth=". Read more about these in the
> mkfs.xfs man page.
> Nate Straz nstraz@xxxxxxx
> sgi, inc http://www.sgi.com/
> Linux Test Project http://ltp.sf.net/