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#206134 - 22/02/2004 09:17 Multi-tier file system
BleachLPB
enthusiast

Registered: 01/11/2001
Posts: 354
Loc: Maryland
I don't know if this solution exists already, but here goes...

It would be nice to have a multi-tier file system. One where a single file might exist in multiple locations within the file system. Similar to how on the Empeg, you can have songs in multiple places, but they are only pointers to the actual file.

Here is my situation. I download a lot of stuff from news. Among other things, I collect Simpsons episodes. When I download them, after checking the file to make sure it is OK, I place it in a "to be archived" directory. Periodically, I touch all my "to be archived" directories and dump to DVD. At that point, I might choose to delete the file, or place it in my "media" directory. In my media directory I have shares set up for xbmp on my xbox - so I can browse through my different shows on my xbox and watch on regular TV.

The problem here - it would be wasteful to copy a newly downloaded episode and put it in the "to be archived" dir, and also place it in the "media" directory. So, I settled on putting the "to be archived" directories in my "media" directory structure. That is annoying, because I cannot organize the shows by season.

It would be nice to have an archival directory, and also have the same file exist in my media directory. Therefore, when performing archiving functions, I can easily sort and distinguish what needs to be archived. And for media file viewing purposes, everything in the media directory is neatly organized by show and season. Under such an arrangement, there would be 2 instances/pointers of the file in the file system.

But with the capacity of hard drive ever increasing, I might just resort to the wasteful methodology. At any given time, I would be wasting a maximum of 4.7 gb.
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BleachLPB ------------- NewFace MK2a

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#206135 - 22/02/2004 09:24 Re: Multi-tier file system [Re: BleachLPB]
mlord
carpal tunnel

Registered: 29/08/2000
Posts: 14484
Loc: Canada
This is sometimes referred to as hard linking, whereby the concepts of a file and of directory entries which reference said file are separate entities. Standard feature on nearly all operating systems. Not on yours?

Cheers

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#206136 - 22/02/2004 09:54 Re: Multi-tier file system [Re: mlord]
julf
veteran

Registered: 01/10/2001
Posts: 1307
Loc: Amsterdam, The Netherlands
Of course Plan9 (the UNIX successor from Bell Labs that became Inferno) even did the multi-level migration automatically. Nothing was ever finally and irrecoverably deleted. In effect, the disks were just a cache for the CD-W jukebox.

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#206137 - 22/02/2004 13:21 Re: Multi-tier file system [Re: mlord]
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
Assuming Windows, NTFS has a hard link feature, but it's not generally accessible via the OS. Good show. I think there are utilities out there that'll let you create them, but I don't know what the impact might be.

If he's using an OS without NTFS support, like 9x or Me then he's out of luck.

Googling on "ntfs hard link" turned up some stuff, including utilities to make them. There was also a reference to a MS KB article on how to create them that's since been deleted.
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Bitt Faulk

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#206138 - 22/02/2004 14:09 Re: Multi-tier file system [Re: wfaulk]
brendanhoar
enthusiast

Registered: 09/06/2003
Posts: 297
> There was also a reference to a MS KB article on how to
> create them that's since been deleted.

Knowing MS, that's pretty good evidence you should avoid that "feature" under their OS...

-brendan

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#206139 - 22/02/2004 14:34 Re: Multi-tier file system [Re: brendanhoar]
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
It might have had to do with a reported "security exploit" by which a person could create a hard link to another file and then the auditing process wouldn't catch accesses to the new link. It was unclear whether this was a problem because the audit wouldn't see the access under the new name at all, or if it reported it only under the new name, or if it allowed one to bypass filesystem permissions somehow. Regardless, it didn't seem like a problem with the link itself, but how other elements of the OS dealt with it, and then only from a "it might do something other than what you expect" or "our other tools are broken" point of view.
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Bitt Faulk

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#206140 - 22/02/2004 19:17 Re: Multi-tier file system [Re: brendanhoar]
image
old hand

Registered: 28/04/2002
Posts: 770
Loc: Los Angeles, CA
use junction from sysinternals.com to do the hard links to directories. i use it a lot for "My Documents" archiving.

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#206141 - 22/02/2004 21:42 Re: Multi-tier file system [Re: wfaulk]
mlord
carpal tunnel

Registered: 29/08/2000
Posts: 14484
Loc: Canada
And if the "OS" is DOS, one might still be able to find the DOS "symlink" utility I wrote/distributed long, long ago..

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