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Date:      Fri, 24 Oct 1997 01:37:03 +0930
From:      Mike Smith <mike@smith.net.au>
To:        Luigi Rizzo <luigi@labinfo.iet.unipi.it>
Cc:        hackers@FreeBSD.ORG
Subject:   Re: zipfs filesystem anyone ? 
Message-ID:  <199710231607.BAA01020@word.smith.net.au>
In-Reply-To: Your message of "Thu, 23 Oct 1997 07:38:26 %2B0100." <199710230638.HAA26030@labinfo.iet.unipi.it> 

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> Thus, I was looking at something which would pass all filesystem
> (or vn ?) calls to some user-space process which could then handle
> them properly.

Look at the 'rumba' port for an example of using the NFS interface to 
achieve this.

> NOTE 2: Why ZIP and not .tar.gz
> 
> Implementing such a "filesystem" in user space is much easier if the
> directory structure is directly available in the archive, rather than
> being scattered all around and mixed with data. gzipped tar files have
> this problem: you need to decompress data before being able to use
> them. Conversely, I think zip archives have the directory structure in
> clear and so it is easier to move through the tree, and decompression
> is only necessary on the single components.

You are correct; gzipped tarfiles are organised the wrong way around 
(metadata inside the compressed envelope), while zipfiles keep the 
metadata outside.

mike





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