[mythtv-users] Before I tear my hair out can a slave BE...

Mike Perkins mikep at randomtraveller.org.uk
Thu Feb 5 21:47:10 UTC 2009


Michael T. Dean wrote:
> On 02/05/2009 09:29 AM, Mike Perkins wrote:
>> Michael T. Dean wrote:
>>> He is.  It will be in MythTV 0.22 at the soonest.
>>>
>>> If you have more than 1 remote backend, you can stagger runs of the 
>>> script
>>> where the first wakes up the first remote backend, then a few minutes 
>>> later,
>>> the second script checks if more capture cards are required and then 
>>> wakes
>>> the second remote backend, etc.
>>>
>> This procedure assumes, to my understanding, that the tuners on the 
>> slave(s) are all of the same type as those on the master. What happens 
>> when the tuner types are different? E.g. firewire vs OTA vs satellite?
>>
>> Chris, will your proposed change be able to wake up the correct slave 
>> if that proves necessary? 
> 
> Don't know what Chris's plans are, but worst case (with the approach 
> I've given--that works now ;)--and even if Chris's approach just starts 
> waking up backends without knowing which has which capture card as my 
> approach does--the host will wake up, then the scheduler re-runs, then 
> there's still a conflict, so the next run wakes another host, the 
> scheduler re-runs and the conflict is resolved.  Then, the master 
> backend and the 2nd remote backend start recording.  Meanwhile, the 1st 
> remote backend is idle, so it shuts itself down.  Sure, that did wake it 
> up "for nothing", but it didn't take /that/ much energy (a couple 
> hundred watts for a few minutes).
> 
> It would actually be easy to modify the script I posted to account for 
> which channel has the conflict and--using a lookup table in the 
> script--wake the appropriate remote backend.  The 
> myth_upcoming_recordings.pl script allows output of information in any 
> format, so just have it output information about the channel in an 
> easy-to-parse location that the script can access.  I'll leave the code 
> as an exercise for the reader.  :)
> 
Fair enough. I wasn't aware how much information one could get out that way. I 
don't have need to use any of it myself, so haven't investigated.

-- 

Mike Perkins



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