Messages in this thread | | | Date | Wed, 2 Sep 1998 14:43:22 +0200 | From | Eivind Eklund <> | Subject | Re: Implementing Meta File information in Linux |
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On Wed, Sep 02, 1998 at 02:51:26AM -0700, Hans Reiser wrote: > I like this approach. I will also add that it fits perfectly into > my long term semantic enhancement plans for ReiserFS.
Why is all this discussed as being added to a single filesystem instead of as a stacking layer? This is something that fit perfectly as a stacking layer, meaning it could work for _all_ filesystems instead of just one, and still could be done as an experiment, and that it would never bug down the users that don't want this semantic.
Yes, that would mean that somebody would have to extend the Linux VFS, or make a single 'filesystem' that functioned as a holding area for stacks. IMO: Cheap at the price.
The references for stacking layers are available from John Heidemann's homepage at http://gost.isi.edu/~johnh/SOFTWARE/UCLA_STACKING/index.html
If you're seriously interested in this sort of design, I'd also recommend reading some of the papers on 'building block design' for filesystems that IBMs researchers keep putting out (mostly based on the Hurricane filesystem). That, however, does much larger changes to the structure than John Heidemann's work (but would allow individual _programs_ to select which semantic they want, which is fairly neat :-)
Eivind.
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