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Re: Review of draft-ietf-webdav-quota-02.txt

From: Brian Korver <briank@xythos.com>
Date: Fri, 12 Dec 2003 12:24:28 -0800
Message-Id: <2F629A30-2CE1-11D8-8BCD-000A95AACED2@xythos.com>
Cc: WebDAV <w3c-dist-auth@w3.org>
To: Stefan Eissing <stefan.eissing@greenbytes.de>

On Dec 12, 2003, at 1:32 AM, Stefan Eissing wrote:
> Chris,
>
> I agree to your analysis that the current definitions lead to 
> confusion. The way out
> is to simplify the underlying model.
>
> Definition: a "quota space" is a storage area on the server where 
> allocation can
> be restricted. All collections on a server either belong to a 
> particular quota space
> or to no quota space at all (in which case storage allocation, if 
> possible, in such
> collections cannot be controlled by quotas).

Finally, the definition of "quota space".


>
> Corollary1: all collections of a particular quota space report the 
> same values for
> their DAV:quota* properties.
>
> Corollary2: all resources belong to the same quota space as their 
> parent collection(s).

That was the implicit model of the original spec (when quotas were on
directories only).  I think this is a good simplification.


>
> Corollary3: all collections which may contain bindings to the same 
> resource do
> belong to the same quota space. Collections in different quota spaces 
> cannot
> have bindings to the same resource.

I have several problems with this.  First, I believe it implicitly 
forbids
soft-link type binding models.  Did you mean here only the binding model
spelled out in the current binding draft?  Second, it forbids quota 
models
that some vendors support (and have customers that find useful).


>
> With this model, /A and /A/UploadDirectory will either have the same 
> DAV:quota*
> values or totally unrelated ones, depending if the two collections 
> belong to the
> same or to different quota spaces. Thus the problem of "it does not 
> sum up" is
> avoided. Also, server side implementation can be much simpler, as the 
> hiearchies
> (e.g. bindings) of collections and resources do *not* influence the 
> quota values.
>
> //Stefan

-brian
briank@xythos.com
Received on Friday, 12 December 2003 15:24:34 GMT

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