[mythtv-users] A clustered PVR just rocks...

Marc drayson at net1plus.com
Sat Jan 19 17:22:55 UTC 2008

> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org [mailto:mythtv-users-
> bounces at mythtv.org] On Behalf Of Drew Tomlinson
> Sent: Saturday, January 19, 2008 11:11 AM
> To: Discussion about mythtv
> Subject: Re: [mythtv-users] A clustered PVR just rocks...
> On 1/17/2008 8:24 PM David Whyte said the following:
> > On Jan 18, 2008 2:16 PM, jedi <jedi at mishnet.org> wrote:
> >
> >> Ok...
> >>
> >>     On the one hand, it does kind of suck that it takes about
> >> 4 times as longer to transcode HD recordings as it does SD
> >> recordings...
> >>
> >>     OTOH, every Linux cpu in the house can be employed to deal
> >> with the problem. It's just an apt-get away. What can't transcode
> >> can commflag.
> >>
> >>     Between my desktop, my frontend, and my backend I've got 5
> >> cpus distributed over the home network catching up on the backlog.
> >>
> >>     That's just too cool...
> >>
> >
> >
> > Ummm, how?
> >
> > I had to transcode two HD shows last night and it took *forever*.  I
> > sat there working on my laptop that was doing nothing at all and
> > wondered whether I could use it for any good?
> Yes, please post a link to a guide.  I'd like to look into this as well
> since my combo BE/FE only has an Athlon XP 2800.  It works but it's
> very
> busy.  :)
> Thanks,
> Drew

If you install myth on your other machines as slave backends to the master
backend it will offload the jobs (commflag, transcoding) to the multiple
backends. You don't have to have a capture device in the machine to run it
as a backend system.
I have a FE/BE and a MBE system already. I'm going to have a 3rd backend
that is only online at certain times. Planning to offload older recordings
to it as an archive machine and then update the database to know the
recordings are on it to play them if I want to. I may start turning off the
FE/BE system when I'm not home as well to save on electricity.
I finally got the 3rd machine fully installed last night right before my
master backend finished recording 3 shows at the same time. When I looked at
the job list in mythweb I noticed that all 3 backends had done a commflag, 2
in HD, 1 in SD. It only took about 15 - 25 mins for all the jobs to finish.


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