On Sun, Mar 05, 2000 at 07:00:02PM +1100, Chris MacKenzie wrote:
> Snapped up from comp.os.linux.misc......
>
> > This is worth reading!
actually it is a waste of time...
> > Microsoft has been working hard to develop a new technology that will save
> > disk space!! Links to files!!!! Incredible? No!
> >
> > Read it detailed at:
> >
> > http://www.microsoft.com/presspass/features/2000/02-28w2k.asp
>
> Gee, I wonder where this "new" technology will take us....Just think in
> 6 years MS Windoze might have hardlink support as well ! *8-)
First off, NT v3.1 has had POSIX file system semantics. That means it had
hardlinks. I believe since NT v4.51 POSIX symlink semantics have also been
included.
Secondly, SIS is not symllinking. Essentially a process generates an md5sum
for files; compares them against other files. If it matches any other is
store a copy somewhere and replaces all the other files with links to the
one copy.
Should an in-core change occur to an opened file/handle it recomputes the md5sum
if it matches it unlinks the file and writes it back in its original place.
Interesting technology but I doubt whether disk space is the first concern
of a Windows admin.
Anand
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