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Re: [hylafax-users] Batch Mode



thank you Lee for your great information.
I think I will try to disable batching for the moment. I can't find out
how to do this anyway (using the current stable debian package 4.2.1) ?

would somebody know how to switch it off ?

thanks
Moritz

On Tue, 2006-02-14 at 11:26 -0800, Lee Howard wrote:
> moritz winterberg wrote:
> 
> >while testing once I submitted several faxes with the same destination
> >to the hylafax server. They got queued as expected but after a certain
> >period got added into batches. Since I've no clue about batch mode and
> >this behaviour seems to have strange interaction with my capi4hylafax
> >wrapper script I'd like to know more about it.
> >Could someone give me a hint about what batch mode exactly is about or
> >point me to some good documentation.
> >
> 
> The configuration parameters (BatchLogs and MaxBatchJobs) are documented 
> in the hylafax-config man page:
> 
>   http://hylafax.sourceforge.net/man/hylafax-config.php
> 
> The "supportsBatching" dest info option is found in the hylafax-info man 
> page:
> 
>   http://hylafax.sourceforge.net/man/hylafax-info.php
> 
> There is a very short mention of batching in the faxsend man page:
> 
>   http://hylafax.sourceforge.net/man/faxsend.php
> 
> It is probably the most relevant for the sake of the wrapper (that 
> faxsend can be invoked with multiple sendq files named).  However, if 
> capi4hylafax is to support batching in the fax protocol, then these 
> Bugzilla reports should be good reference:
> 
>   http://bugs.hylafax.org/bugzilla/show_bug.cgi?id=118
>   http://bugs.hylafax.org/bugzilla/show_bug.cgi?id=625
>   http://bugs.hylafax.org/bugzilla/show_bug.cgi?id=667
> 
> As far as understanding how fax batching is performed in faxq, I have 
> posted a few relevant messages to this list on that, but they're 
> probably not completely accurate... so let me just briefly say what happens.
> 
> As the time-to-send arrives for a queued job faxq will proceed through 
> the list of all jobs on the run queue as well as the jobs in the blocked 
> queue as well as the jobs in the sleeping queue.  Any of those jobs that 
> are destined to the same destination as the first job will be "batched" 
> (up to the MaxBatchJobs amount).  Some consideration is made to 
> priorities in competing jobs to different destinations (so that they 
> don't go ignored due to batching), and it should be sensible, but I 
> can't remember it enough to explain it.  When the entire batch is 
> assembled then faxsend is invoked with a list of the jobs.  The fax 
> protocol used in faxsend is to separate the jobs as different 
> "documents" using the EOM signal.
> 
> If the batched job fails then the jobs are separated and returned to the 
> queue with new (and possibly different) times-to-send.  Because batching 
> pulls from the sleeping queue they will likely be batched on any retries 
> (provided that the failure did not trigger supportsBatching:false)... 
> only they'll probably be shuffled-up a little bit.
> 
> Lee.


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