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SubjectRe: [ANNOUNCE] RAIF: Redundant Array of Independent Filesystems
Date
Nikolai Joukov wrote:
> > > We started the project in April 2004. Right now I am using it as my
> > > /home/kolya file system at home. We believe that at this stage RAIF
> > > is mature enough for others to try it out. The code is available at:
> > >
> > > <ftp://ftp.fsl.cs.sunysb.edu/pub/raif/>
> > >
> > > The code requires no kernel patches and compiles for a wide range of
> > > kernels as a module. The latest kernel we used it for is 2.6.13 and
> > > we are in the process of porting it to 2.6.19.
> > >
> > > We will be happy to hear your back.
> >
> > When removing a file from the underlying branch, the oops below happens.
> > Wouldn't it be possible to just fail the branch instead of oopsing?
>
> This is a known problem of all Linux stackable file systems. Users are
> not supposed to change the file systems below mounted stackable file
> systems (but they can read them). One of the ways to enforce it is to use
> overlay mounts. For example, mount the lower file systems at
> /raif/b0 ... /raif/bN and then mount RAIF at /raif. Stackable file
> systems recently started getting into the kernel and we hope that there
> will be a better solution for this problem in the future. Having said
> that, you are right: failing the branch would be the right thing to do.

Good. It seems that there is also some tmpfs/raif-over-nfs deadlock
situation. Can't really tell if it's the kernel or the raif, but when do
you think the patches could be brought into sync with the current mainline?


Thanks!

--
Al

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