[mythtv-users] Slave Backend requirements

[Michael T. Dean]

On 08/20/2013 10:34 PM, Michael Watson wrote:
> I run my Frontends as SBE (with a configured Dummy Tuner) to assist 
> with commercial detection, whilst I know I can use mythjobqueue to 
> achieve this, with Mythjobqueue the SBE/Frontend will not shut down 
> whilst not in use, mythjobqueue is great for a 24x7 system.

I'm not sure what, specifically, you mean by this, but since Feb 2012 
mythjobqueue only holds a blocking connection when it's actually 
processing jobs, but changes to a non-blocking connection (which allows 
master backend shutdown) when it's idle.  (This has been in releases 
since 0.25.)

http://www.gossamer-threads.com/lists/mythtv/commits/502795#502795

So a mythjobqueue server won't prevent the master backend from shutting 
down, unless it's actually running a job (which requires master backend 
presence/availability).  And a mythjobqueue server will take 
significantly less resources than a remote backend.

If you're saying that the master backend won't send out a message 
telling the mythjobqueue system to go to sleep, that's true, but then 
again, that's only useful on a machine with tuners that the master 
backend may decide to use at some time that the remote backend can't 
predict.  On a machine that doesn't have tuners that may be needed at 
some unknown point in the future, the machine can simply shut down when 
it desires.  So, you could use the frontend idle shutdown capability or 
mythshutdown to shut down the computer when idle.

I don't know if mythfrontend's idle shutdown capability checks job queue 
status, but I know mythshutdown does, so you may need to use mythshutdown.

Mike