hardlinks on ntfs/fat

hardlinks on ntfs/fat

[Gerrit P. Haase]

Hi cygwinners,

how is it exactly with hardlinks?

I got a directory with some files (about 5000),
and i made hardlinks to all of them in another directory.

If i examine now with win-explorer, i got i the first dir
about 17 MB and in the latter about 18 MB of files.

Are they now twice at the disk or are they relly hardlinked?

gph

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Re: hardlinks on ntfs/fat

[Corinna Vinschen]

On Mon, May 07, 2001 at 08:48:40AM +0200, Gerrit P. Haase wrote:
> Hi cygwinners,
> 
> how is it exactly with hardlinks?
> 
> I got a directory with some files (about 5000),
> and i made hardlinks to all of them in another directory.
> 
> If i examine now with win-explorer, i got i the first dir
> about 17 MB and in the latter about 18 MB of files.
> 
> Are they now twice at the disk or are they relly hardlinked?

If the file system is NTFS and both directories are on the
same file system, then they are real hardlinks. Otherwise
they are copies.

Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.

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Re: hardlinks on ntfs/fat

[Konstantin Isakov]

Monday, May 07, 2001, 10:48:40 AM, you wrote:

GPH> Hi cygwinners,

GPH> how is it exactly with hardlinks?

GPH> I got a directory with some files (about 5000),
GPH> and i made hardlinks to all of them in another directory.

GPH> If i examine now with win-explorer, i got i the first dir
GPH> about 17 MB and in the latter about 18 MB of files.

GPH> Are they now twice at the disk or are they relly hardlinked?

I think the most easiest way to find it out is to check drive's free space
amount before and after hardlinking ;)


-- 
Konstantin Isakov



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Re: hardlinks on ntfs/fat

[Randall R Schulz]

Konstantin,

I think the "inode number" reported by "ls -i" is a better way of 
ascertaining if two directory entries reference the same file or not.

I am curious about why "ln" would copy a file if it gets EXDEV (if I 
remember that right -- Error: cross-device link). I certainly wouldn't want 
that to happen if I explicitly ask to link (not copy). Is that specified 
behavior for the Unix / Linux / POSIX way for the ln command? I see no 
mention of this behavior in the man page or the "ln --help" output.

Randall Schulz
Mountain View, CA USA


At 04:48 2001-05-08, Konstantin Isakov wrote:
>Monday, May 07, 2001, 10:48:40 AM, you wrote:
>
>GPH> Hi cygwinners,
>
>GPH> how is it exactly with hardlinks?
>
>GPH> I got a directory with some files (about 5000),
>GPH> and i made hardlinks to all of them in another directory.
>
>GPH> If i examine now with win-explorer, i got i the first dir
>GPH> about 17 MB and in the latter about 18 MB of files.
>
>GPH> Are they now twice at the disk or are they relly hardlinked?
>
>I think the most easiest way to find it out is to check drive's free space
>amount before and after hardlinking ;)
>
>--
>Konstantin Isakov


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