[Mailman3-dev] Problem with the schema
J C Lawrence
claw at kanga.nu
Wed Mar 30 23:25:07 CEST 2005
On Wed, 30 Mar 2005 10:58:34 -0600 (CST)
John-Paul Robinson <jpr at uab.edu> wrote:
> Until a roster is orphaned (no longer has any references) it is not
> eligable for deletion (similar to a hard link in a traditional file
True, and there are other interesting cases. Consider:
I have a company. The company is organised into project and focus
Each team is represented by a roster which contains all members of
A given individual may be part of multiple teams, and thus may be
present on multiple rosters. This is especially true for managers and
Every project is represented by a mailing list.
As projects develop over time they intersect and involve different
teams. To represent this rosters are simply andded to and removed
from the relevant mailing lists.
A given roster may be linked to multiple lists.
A given roster may be linked to no lists and remain so unlinked for a
considerable period. Such a roster must not be deleted.
A given email address may occur multiple tiles across the different
rosters that are referenced by a given list. (This is mentioned
simply because only one email should be sent).
Rosters are first class objects that require their own distinct
> Note, in cases where the subscribers and rosters come from an external
> source, the "zero reference" condition may not be under the control of
> mailman. That is, a roster may always have > 0 reference in this
> situation and mailman would never try to delete it.
I'd argue that Mailman should never try to delete a roster unless that
roster-type's own expiry polocy states that it should be deleted. The
nice this is that this need not be done automatically and instantly. It
is a housekeeping function and so can be done cheaply via a low
frequency (monthly?) cronjob.
J C Lawrence
---------(*) Satan, oscillate my metallic sonatas.
claw at kanga.nu He lived as a devil, eh?
http://www.kanga.nu/~claw/ Evil is a name of a foeman, as I live.
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