Re: [RFC PATCH 1/1] vfs: Filemash fs

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On Thu, Apr 11, 2013 at 10:44:32AM +1000, Dave Chinner wrote:
> On Mon, Apr 08, 2013 at 11:47:09AM +0800, Ram Pai wrote:
> > On Sun, Apr 07, 2013 at 03:03:29PM +0400, Vyacheslav Dubeyko wrote:
> > > Hi Ram,
> > > 
> > > On Apr 3, 2013, at 2:23 PM, Ram Pai wrote:
> > > 
> > > > The following patch implements a filesystem driver which provides the ability
> > > > to mashup exisiting files in creative ways in-order to create new files.
> > > > 
> > > > Think of it as a way to union files; not filesystems.
> > > > 
> > > > Its a prototype idea with a prototype implementation.  Tested and working on
> > > > 3.0.9-rc1.  I have included Documentation file which details the idea with
> > > > examples and possible applications.
> > > > 
> > > > Any suggestions/ideas to make this useful and generally applicable is very much
> > > > appreciated!
> > > > 
> > > 
> > > Why do you think that your solution is better than LVM or RAID technologies?
> > 
> > Each has its own place. LVM/RAID lets you build block devices in
> > creative ways. Filemashup lets you build files in creative ways.
> > So both solutions have their own application which are not necessarily
> > the same. Hence I can't say one is better than the other.
> > 
> > > 
> > > I think that using mount options in your solution is weird way. Let's imagine a file that it will include a hundreds parts.
> > 
> > Well, I tried to mimic the same kind of approach used by overlayfs to
> > union-mount directories. 
> > 
> > Yes. you are right. if you want to mashup hundreds of files, then you
> > will have to provide all those hundred files on the command line, or you
> > can put the options in /etc/fstab.  Can you think of a better approach?
> 
> Overlay-style filesystem that keeps the mashup information in
> xattrs in the underlying files.

Thanks Dave for the suggestion. Will explore that.
RP

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