[mythtv-users] Slave backend keeps crashing

[Paul V. Gratz]

Thanks for the reply! See my answers below:

On Wednesday 28 September 2005 07:08 pm, Nick wrote:
> > 2005
> > 2005-09-27 18:31:00.003 Finished recording That '70s Show on channel:
> > 1068 2005-09-27 18:31:00.051 Changing from RecordingOnly to None
> >
> > 2005-09-27 18:39:32.598 Finished, 6 break(s) found.
> > 2005-09-27 18:57:48.588 Changing from None to RecordingOnly
> > 2005-09-27 18:58:47.832 ChannelBase: Could not find input: Television on
> > card when setting channel 69
>
> Does this error only appear when the PVR-500 machine has 'crashed' or
> is there a problem with the channel/input setup?

This one turned out to be caused by a miss configuration of mythtvsetup for 
that half of the card. I was having an unrelated problem where I kept getting 
the wrong channel recorded from the second tuner. I didn't realize that for 
both "cards" in the setup you are supposed to select "tuner 0".


>
> > 2005-09-27 18:58:47.937 Changing from None to RecordingOnly
> > 2005-09-27 19:00:50.097 Starting Commercial Flagging for "Seinfeld"
> > recorded from channel 1002 at Tue Sep 27 18:29:00 2005.
> > 2005-09-27 19:00:52.525 New DB connection, total: 1
> > 2005-09-27 19:00:52.575 New DB connection, total: 2
> >
> > 2005-09-27 19:29:56.175 Finished, 2 break(s) found.
> > 2005-09-27 19:42:26.867 IOBOUND - blocking in ThreadedFileWriter::Write()
> > 2005-09-27 19:42:29.770 IOBOUND - blocking in ThreadedFileWriter::Write()
> > 2005-09-27 19:42:36.596 IOBOUND - blocking in ThreadedFileWriter::Write()
> > 2005-09-27 19:44:29.603 IOBOUND - blocking in ThreadedFileWriter::Write()
> > 2005-09-27 19:44:30.534 IOBOUND - blocking in ThreadedFileWriter::Write()
> > 2005-09-27 19:44:30.934 IOBOUND - blocking in ThreadedFileWriter::Write()
> > Killed
> > livingroom mythrun #
> > livingroom mythrun #
>
> Does this error only happen when the backend machine is under heavy
> network load, or can it occur when only recording a single stream from
> the frontend?
>
> > This is with mythtv version .18.1 installed on gentoo machines.
> >
> > Do you guys have any advice as to what is going on?
>
> Could be network related. I would seriously consider (if convenient)
> testing with the PVR card in the backend and then accessing the
> recordings from the frontend. There's no reason at all why you
> shouldn't be able to have the cards distributed between the 2
> machines, but if you are writing and reading across the network
> heavily at the same time it might make sense to test by writing
> everything locally and then reading from the frontend remotely. Have
> you run top whilst the two machines are up to see how the load varies?
>
> You should certainly be able to record two streams (using hardware
> encoding/DVB) and playback 1 stream over the network, assuming fast
> enough systems (the network hardware itself should be able to support
> this).
>
> Nick


Yeah I would have though so too but I'm starting to get really suspicious of 
my network setup, I've noticed that nfs is not always performing as well as I 
would expect. Anyways, I took your advice and moved the pvr-500 into my 
master backend machine.  So far no backend crashes (12 hours and 
counting...). 

One other thing for anyone following that may read this, oddly when I moved 
the pvr500 into the master backend I suddenly got the "no sound on card 0" 
problem. I was running ivtv v .3.8.  I upgraded to the latest svn version and 
that problem was fixed.  I don't know why v .3.8 worked fine in my slave 
backend... Pretty weird.

Thanks
Paul
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