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Re: Hiding nodes with unionmount

From: Sergiu Ivanov
Subject: Re: Hiding nodes with unionmount
Date: Sun, 6 Sep 2009 11:33:23 +0300
User-agent: Mutt/1.5.20 (2009-06-14)


On Sat, Sep 05, 2009 at 04:04:49PM +0200, Arne Babenhauserheide wrote:
> Am Mittwoch, 5. August 2009 12:41:59 schrieb Sergiu Ivanov:
> > Yes, this is true.  I'd say the VCS filesystems topic should be
> > revisited and thought over more attentively.  Committing at some
> > intervals, dynamically adjusted to the disk load (like: ``commit more
> > often when more operations are done'') could be a nice (and simple)
> > solution for desktop systems.
> Also a second layer could be added where userspace programs could trigger a 
> commit. 
> "commit if Important mail received" or "commit if central config file changed"

Indeed, that should be great.  I'd like to be able to follow the
development of btrfs, but, unfourtunately, I don't really have
sufficient time for that.  However, from the description on Wikipedia
(http://en.wikipedia.org/wiki/Btrfs) it looks nice.

> > In this case the package manager doesn't store the modifications.  It
> > can only hide or show files, which allows the user to do only the rm
> > operation, since creating a new configuration file may be, actually, a
> > modification of the base one.  What should happen to customized system
> > (configuration) files in this case?
> They would simply be snapshot - no diffs saved, but only the new file. 

Aha, I see.
> > Indeed, a proper resource accounting framework might result in a
> > complete isolation of different users.  So, let's port the Hurd to
> > Viengoos ;-)
> The state should be here (but isn't...): 
> http://www.gnu.org/software/hurd/microkernel/viengoos.html
> Some info might be here: 
> - http://projectxoo.blogspot.com/

I guess porting the Hurd to Viengoos is still a matter which is more
discussed about than really attended to :-(
> > I'll read these links today.  Sorry for not having read them so far --
> > it's lack of time, as usual :-(
> No problem. I know that problem far too well myself... 

I've read the story :-) Your power of allegory fascinates me :-)


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