allow duplicate message

[Scott Adkins]

--On Friday, November 19, 2004 10:17 AM -0800 Wil Cooley 
<wcooley at nakedape.cc> wrote:

> IOn Fri, 2004-11-19 at 10:58 -0500, Scott Adkins wrote:
>> I don't believe this is the case... We set it to "no" on our site because
>> we see a lot of lock contention on the duplicate delivery database.  The
>> problem is that setting it to "no" doesn't help if you have SIEVE enabled
>> in your server.  From what I could tell in the source code, SIEVE makes
>> very active use of the duplicate delivery database, for vacationing,
>> forwarding, redirections, etc.
>
> Are you saying that using Sieve makes it impossible to disable duplicate
> suppression or that Sieve just uses the duplicate delivery database
> regardless of the 'duplicatesuppression' setting?  The former should be
> reported as a bug (http://bugzilla.andrew.cmu.edu/); the latter a point
> for discussion.

I think it kinda works both ways... the way the code was written (I am
working from memory now) was that if the option was set to "no", then it
simply did not open the delivery database.  The code would still call the
duplicate suppression routines, but those routines would bail out first
thing if it found the database not to be open.

With SIEVE, the code more reads like this:  "if SIEVE not defined and the
setting is 'no' then do not open the database".  Consequently, the database
*is* opened (because of the presense of SIEVE), and all of the duplicate
suppression routines then work as normal.

So, it turns into an all or nothing event.

The right solution is to not base the decision on whether or not the DupDB
is open, but on whether or not a portion of code should check the DB based
on the current setting...  I don't think there were *that* many places in
the code that checked for duplicate messages...

Scott

>
> Wil
> --
> Wil Cooley <wcooley at nakedape.cc>
> Naked Ape Consulting, Ltd. <http://naked-ape.com>
>
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      Scott W. Adkins                http://www.cns.ohiou.edu/~sadkins/
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