News Group Posts

mmdf MLCKTYPE advisory

Subject: Re: Long Mail Queues
References: <Y%Qu7.61$yV5.1378@nsw.nnrp.telstra.net>
<T%av7.50$ca6.1348@nsw.nnrp.telstra.net>
<3bbebd2e$0$331$8eec23a@newsreader.tycho.net>
<Q45w7.7$m8.1543@nsw.nnrp.telstra.net> 
From: spcecdt@deeptht.armory.com (John DuBois)
Date: 08 Oct 2001 00:12:08 GMT

In article <Q45w7.7$m8.1543@nsw.nnrp.telstra.net>,
Greg Hines <greghines@bigfoot.com.NOSPAM> wrote:
>John,
>
>'MLCKTYPE advisory' was not in mmdftailor.  Added and ran the deliver
>command again.  See sample output below.
>
>/usr/spool/mmdf/lock/home/msg is now empty.
>
>Looks like your suggestion has done the trick.  Can you please explain what
>this entry does and why it has to be added??  More importantly why was it
>not there in the first place, as it seems to be necessary.

MLCKTYPE sets the type of mailbox locking that MMDF does.  Some types of
locking are subject to invalid persistence, hanging around after the process
that did the locking died without removing the lock.  The default is to use all
known locking types, to provide comprehensive locking in case some very old
mail programs are used that only know about older locking types.  In practice,
the only type of locking needed these days is advisory locking, which is a
"safe" type in that it automatically goes away when the locking process exits.

        John
-- 
John DuBois  spcecdt@armory.com.  KC6QKZ/AE  http://www.armory.com./~spcecdt/
 

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