Am I the only one getting duplicate postings? This is the second copy of
this one, and I got several copies of the one it's responding to.
--
- Dave Lovelace
[EMAIL PROTECTED]
[EMAIL PROTECTED]
Patrick Powell wrote:
>
> > From [EMAIL PROTECTED] Mon Jun 28 10:48:28 2004
> > Date: Mon, 28 Jun 2004 10:42:31 -0700 (PDT)
> > From: Charlie Root <[EMAIL PROTECTED]>
> > To: undisclosed-recipients:;
> >
> > hi list,
> > i need a pointer to the current job handling.
> > i guess lprng scans the directory on every loop. so its takes quit long
> > to process a long list of entries.
> > i plan a patch to cache the entries and reread the directory only when
> > the list is empty.
> >
> > does anyone know where this is handled exactly and how ?
> >
> > mfg
> > wh
>
> The problem is compounded by the fact that when you add jobs
> the priority of newly added jobs may be higher than the
> current jobs in the queue.
>
> To handle this, each time a job is added to the queue,
> it needs to be rescanned and the job priorities recalculated.
> Also, the LPC commands 'topq' and 'move' may cause the queue
> to be rescanned.
>
> And of course, your good friend LPQ will cause the queue to be
> rescanned.
>
> I have spent a fair amount of time on this problem, and decided
> that the only way to solve the problem is to NOT use the directory
> structure, but to place all of the job information in a database.
>
> The first couple of attempts to do this resulted in horrors, as the
> file locking, dbm versions, conflicting libraries, etc., caused
> more headaches than I would have ever possibly imagined.
>
> I backed out the use of the DBM database.
>
> A possible improvement is to have one process SCAN the directory
> and then cache the 'fstat' information and the 'control file'
> contents. The problem here is that each time a job is processed
> (added to the queue, remove from the queue, etc.), this file would need
> to be updated.
>
> Now, if this is of little or no concern to you, then there
> is a very quick fix.
>
> In the lpd_jobs.c file, look for the code that checks to see if
> a SIGUSR1 signal has arrived. This sets a 'rescan' flag.
> Comment out the code that checks this flag and does a 'rescan'.
>
> There are a couple of other gotchas there, basically dealing with
> LPRM removing jobs, but this will cause the queue to be scanned only
> after all the jobs in the queue are processed in the order that
> they were first in.
>
> I may do this, and add a 'scan_queue_only_when_all_jobs_processed'
> option to invoke this.
>
> Patrick ("Don't look up? Then why did you say 'duck?' I don't see no ducks?")
> Powell
>
>
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>
> If you have major problems, call Patrick Powell or one of the friendly
> staff at Astart Technologies for help. Astart also does support for LPRng.
> Also, check the Web Page at: http://www.lprng.com for any announcements.
> Astart Technologies (LPRng - Print Spooler http://www.lprng.com)
> 6741 Convoy Court
> San Diego, CA 92111
> 858-874-6543 FAX 858-751-2435
> -----------------------------------------------------------------------------
>
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YOU MUST BE A LIST MEMBER IN ORDER TO POST TO THE LPRng MAILING LIST
The address you post from or your Reply-To address MUST be your
subscription address
If you need help, send email to [EMAIL PROTECTED] (or lprng-requests
or lprng-digest-requests) with the word 'help' in the body.
To subscribe to a list with name LIST, send mail to [EMAIL PROTECTED]
with: | example:
subscribe LIST <mailaddr> | subscribe lprng-digest [EMAIL PROTECTED]
unsubscribe LIST <mailaddr> | unsubscribe lprng [EMAIL PROTECTED]
If you have major problems, call Patrick Powell or one of the friendly
staff at Astart Technologies for help. Astart also does support for LPRng.
Also, check the Web Page at: http://www.lprng.com for any announcements.
Astart Technologies (LPRng - Print Spooler http://www.lprng.com)
6741 Convoy Court
San Diego, CA 92111
858-874-6543 FAX 858-751-2435
-----------------------------------------------------------------------------
