[mythtv-users] Auto-shutdown and EPG data

[Henk Poley]

Op zondag 28 maart 2004 11:42, schreef Johannes Niess:

> Am Samstag, 27. März 2004 15:58 schrieb Henk Poley:
> > Op zaterdag 27 maart 2004 15:44, schreef Timo Boettcher:
> > > * Henk Poley <hpoley at dds.nl>, Saturday, March 27, 2004, 2:55:22 PM:
> > > > I've ran MythTV with automatic shutdown (after all frontends are
> > > > disconnected and nothing is recording) for some time noe. But I
> > > > always updated the EPG by hand. Setting a cron job wouldn't really
> > > > help since you don't know is the machine will be on by then. Now I
> > > > figured that others will have the same problem, so have have you
> > > > solved it?
> > >
> > > IIRC Redhat had a special crondaemon named anacron (asyncronous cron)
> > > which was able to find out when a cron-job was last executed and would
> > > then execute it again if it was overdue. It looks like the
> > > vcron/vixie-cron (as installed by gentoo) can do it as well, but I
> > > didn't try.
> > > OTOH, you can write a small script that does something like that:
> > > <snip>
> >
> > Hmm, I figured that yes, but as far as I can tell the HD access of the
> > grabber and database-insertion can interfere with the recording. As since
> > vixie-cron (yes, running Gentoo) will most likely schedule it somewhere
> > after boottime.
>
> Using "batch" should improve the situation. It starts jobs only if the load
> is below a limit. due to the threaded nature of mythtv I get loads of about
> 2 and CPU usage of 40% (P4 2.4 GHz, full PAL, bttv card). "batch" needs a
> load < 0.8 by default to run the script. As "batch" comes with "atd" it
> should be on your box.

Hmm, interesting, but it doesn't seem to be installed (on my 'other' Gentoo 
system, not used as MythTV backend). How should I invoke it? I've currently 
just symlinked the cron job (somewhere in /usr/share/mythtv/) 
in /etc/cron.daily/. 

> It will not detect recordings that start during mythfilldatabase.

Well off coarse. Though I've seen a program that will 'stop' (not kill) a 
program when CPU load get's above some level, and resume it when the system 
is idle again. Too bad I don't remember where I seen it.

Don't know how good that will work with a networked application like XMLTV 
though.

btw, I guess there's no way to get the MythTV scheduler to know that you want 
it to start the machine at least once a day?

	Henk Poley <><