[mythtv-users] Recording Priority = 99 not a trump all?

[Michael T. Dean]

On 06/23/2010 06:05 PM, Jason Ward wrote:
> On 23 June 2010 22:55, Douglas Peale wrote:
>    
>> On 06/23/2010 02:33 PM, David Engel wrote:
>>      
>>> When SchedMoveHigher is enabled, the
>>> scheduler moves recordings around one at a time and the first fit
>>> wins.  it does not continue on looking for "better" fits.
>>>        
>> The example I cite is a recording of NCIS on ION. I have 7 copies of ION on
>> my system 1 OTA HD, 3 cable HD, and 3 cable SD. All
>> three cable SD channels had a priority of -10 the rest were priority 0.
>> There was nothing else scheduled at that time that would
>> match any of my recording criteria. No conflicts.
>>
>> So, you contend that in this situation for the scheduler to choose a SD
>> channel over an HD channel is not a bug?
>>      
> Well David says the scheduler is written to find the first fit not the best
> fit,

Well, more precisely, David said that when users have the setting I 
mentioned way back in the 3rd post in this thread ( 
http://www.gossamer-threads.com/lists/mythtv/users/441014#441014 ) 
enabled, one of its effects is to disable best-fit scheduling and, 
instead, use first-fit scheduling in some circumstances.

In other words, the setting he meant by, "SchedMoveHigher," is actually, 
"Reschedule higher priorities."

>   so yes, there is no bug in so much as the scheduler has worked as it is
> designed to work.

Exactly.  And, more importantly, as the user configured it to work.

>    However, I would agree this isn't exactly desirable
> behavior,

Which is why we have a setting that you can disable (in mythfrontend 
settings, Utilities/Setup|Setup|TV Settings|Recording Priorities, 
IIRC).  The default is that "Reschedule higher priorities" is enabled 
because we got far more users complaining that MythTV wasn't recording 
everything they wanted than users complaining that they don't get a show 
they want until its second airing.

Again, this is all explained very nicely in 
http://www.mythtv.org/docs/mythtv-HOWTO-12.html .  Note, also--as I've 
said /way/ too many times--anyone who modifies /any/ priority other than 
recording rule priorities should read and understand that entire section 
before doing so.  (And, after reading it, you'll likely see that you 
don't want to modify other priorities.)

Mike