From: erik quanstrom <quanstro@coraid.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Re: everything is a directory
Date: Mon, 20 Aug 2007 14:26:15 -0400 [thread overview]
Message-ID: <af1d2f0852998cc2261f0c5c19568b69@coraid.com> (raw)
In-Reply-To: <9f3897940708201036r1d877f55v38f7594f48774537@mail.gmail.com>
> * (IIRC) Beagle daemon uses extended attributes to track files that
> were scanned and are not modified - they contain part of it's detected
> metadata, hash and DB pointer
so, to summarize. beagle is using attributes to extend the file object.
i think the main benefit files (and a filesystem) is exactly that they
are not objects and can't be extended.
>
> * NTFS discards the Unix concept of a file entirely - what was shown
> before as trouble with Alternate Data Streams is in fact trouble of
> keeping backward compatibility (Internally, NT doesn't have drive
> letters or any of the DOS stuff). A File in NTFS is a MFT entry with a
> bunch of attributes. Those attributes have several types/names
> defined, like DATA for file contents, one for keeping filename (for
> which there are three namespaces: DOS8.3, Windows, POSIX), one for
> legacy DOS attributes (used by the official, backward compatible API),
> one for security data, and others used mostly by system daemons
> (Although NT5+ explorer uses one to hold various comments about files.
> Rarely used by people I think).
>
> I especially like the NTFS implementation, because it allows to use
> NTFS for most Operating Systems without modifying internal structure,
> while making it easy to add "compatibility layer"
so how does one create a sensible grep utility that operates on an arbitrary
mft entry?
> As for things that need to work with cp/mv/others, I suggest making
> better file formats or adding metadata in different file. It's not the
> smartest use of Extended Attributes/NTFS attributes :-)
i think you're missing the real difficulty with attributres. the tools approach
works precicely because files are not objects and can't be extended.
if you want a system with extensible object storage and not a filesystem,
i think you need to think about how to add the extension to all tools at
the same time. (or maybe you dispense with the tools approach.) this
doesn't seem like a promising route to me.
- erik
next prev parent reply other threads:[~2007-08-20 18:26 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-16 9:30 [9fans] " jsnx
2007-08-16 10:42 ` maht
2007-08-16 11:47 ` Charles Forsyth
2007-08-17 8:41 ` [9fans] " jsnx
2007-08-16 12:39 ` [9fans] " Francisco J Ballesteros
2007-08-16 14:01 ` David Leimbach
2007-08-16 14:39 ` erik quanstrom
2007-08-16 15:58 ` maht
2007-08-16 17:45 ` David Leimbach
2007-08-16 19:01 ` ron minnich
2007-08-16 19:37 ` Robert Sherwood
2007-08-16 20:49 ` David Leimbach
2007-08-17 8:42 ` Douglas A. Gwyn
2007-08-17 13:00 ` ron minnich
2007-08-17 13:24 ` erik quanstrom
2007-08-17 13:35 ` plan9
2007-08-17 14:22 ` ron minnich
2007-08-17 14:29 ` David Leimbach
2007-08-17 14:29 ` Richard Miller
2007-08-17 14:49 ` ron minnich
2007-08-17 17:49 ` David Leimbach
2007-08-17 18:09 ` Charles Forsyth
2007-08-20 8:48 ` Douglas A. Gwyn
2007-08-20 8:48 ` Douglas A. Gwyn
2007-08-20 14:29 ` Douglas A. Gwyn
2007-08-20 14:53 ` Francisco J Ballesteros
2007-08-20 15:02 ` Rob Pike
2007-08-21 8:48 ` Douglas A. Gwyn
2007-08-21 8:47 ` [9fans] " jsnx
2007-08-21 8:47 ` jsnx
2007-08-23 8:50 ` Douglas A. Gwyn
2007-08-24 8:39 ` jsnx
2007-08-29 9:06 ` Douglas A. Gwyn
2007-08-30 8:35 ` jsnx
2007-08-30 13:18 ` David Leimbach
2007-08-31 9:07 ` Douglas A. Gwyn
2007-08-31 18:04 ` Joel C. Salomon
2007-09-01 12:07 ` Uriel
2007-09-02 1:11 ` Joel C. Salomon
2007-09-02 2:14 ` erik quanstrom
2007-09-02 5:01 ` Anthony Martin
2007-09-02 13:00 ` Uriel
2007-09-02 16:53 ` Joel C. Salomon
2007-09-03 7:50 ` Uriel
2007-09-03 16:40 ` Joel C. Salomon
2007-09-03 19:51 ` Uriel
2007-09-09 21:41 ` roger peppe
2007-09-03 9:27 ` Douglas A. Gwyn
2007-09-03 11:03 ` Charles Forsyth
2007-08-17 14:27 ` [9fans] " David Leimbach
2007-08-17 4:11 ` Skip Tavakkolian
2007-08-17 8:42 ` [9fans] " jsnx
2007-08-17 13:25 ` erik quanstrom
2007-08-17 0:39 ` [9fans] " Uriel
2007-08-17 8:59 ` matt
2007-08-17 12:05 ` erik quanstrom
2007-08-20 8:47 ` [9fans] " jsnx
2007-08-20 9:00 ` Francisco J Ballesteros
2007-08-20 11:34 ` Tom Lieber
2007-08-20 11:40 ` erik quanstrom
2007-08-20 13:33 ` Uriel
2007-08-20 17:36 ` Paweł Lasek
2007-08-20 18:26 ` erik quanstrom [this message]
2007-08-20 18:48 ` Paweł Lasek
2007-08-20 19:52 ` Dave Eckhardt
2007-08-20 21:28 ` Robert William Fuller
2007-08-20 21:40 ` erik quanstrom
2007-08-20 22:05 ` Robert William Fuller
2007-08-21 11:29 ` Brantley Coile
2007-08-21 17:54 ` Robert Raschke
2007-08-22 7:38 ` andrey mirtchovski
2007-08-20 22:12 ` David Leimbach
2007-08-21 0:37 ` dave.l
2007-08-21 1:14 ` David Leimbach
2007-08-21 1:25 ` Uriel
2007-08-21 1:44 ` David Leimbach
2007-08-21 8:48 ` app
2007-08-22 8:47 ` jsnx
2007-08-22 9:54 ` app
2007-08-22 11:22 ` roger peppe
2007-08-22 11:30 ` erik quanstrom
2007-08-23 8:49 ` jsnx
2007-08-21 1:26 ` Roman Shaposhnick
2007-08-21 1:28 ` Uriel
2007-08-22 8:47 ` jsnx
2007-08-20 21:57 ` Uriel
2007-08-20 22:08 ` Robert William Fuller
2007-08-21 8:48 ` jsnx
2007-08-20 11:17 ` erik quanstrom
2007-08-20 17:40 ` Roman Shaposhnick
2007-08-20 17:52 ` Uriel
2007-08-23 8:49 ` jsnx
2007-08-23 10:35 ` Steve Simon
2007-08-24 8:40 ` jsnx
2007-08-24 8:57 ` Martin Neubauer
2007-08-24 10:55 ` David Leimbach
2007-09-06 4:06 ` Roman Shaposhnik
2007-08-29 9:06 ` jsnx
2007-08-30 1:41 ` Uriel
2007-09-06 5:06 ` Roman Shaposhnik
2007-08-29 9:06 ` jsnx
2007-08-23 15:29 ` Douglas A. Gwyn
2007-08-21 8:48 ` jsnx
2007-08-21 11:22 ` Uriel
2007-08-21 15:05 ` Skip Tavakkolian
2007-08-20 8:48 ` [9fans] " Douglas A. Gwyn
2007-08-17 8:42 ` [9fans] " jsnx
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