[mythtv-users] Running mythbackend on a low-power device

Mark Small msmall at eastlink.ca
Fri Dec 7 22:54:15 UTC 2012


On Friday 07 December 2012 16:33:36 Quinten Steenhuis wrote:
> I think I am going to go with a Kirkwood or other ARM-based device. It will
> be a good option for me even if I only improve my in-home backup. I found
> this handy overview of some of the products:
> 
> http://archlinuxarm.org/platforms
> 
> I am looking at the Seagate goflex series, because they come with a speedy
> SATA HD in the same package. I like the neatness of that. However, I don't
> know if 128 MB of RAM is enough to run the mythbackend. Thoughts?
> 


Eek.  That's not much RAM at all.  I quick look at top on my 512 MB backend 
shows this:

PID      USER     PR  NI  VIRT	RES SHR  S  %CPU %MEM	TIME+ COMMAND
10800 mysql     20   0  158m  40m 3504 S  0.0  8.1  52:17.28 mysqld                
 2721 mythtv    20   0  249m  10m 4296 S  0.0  2.1 100:35.37 mythbackend           

Sleeping mythtbackend + Database uses lots of RAM.

Mark



> On Sun, Dec 2, 2012 at 8:18 AM, digid myth <digidmyth at gmail.com> wrote:
> > I played with this awhile and decided to stay with my larger server and
> > have it on all the time. My current setup is a 6 core AMD based server
> > with 12tb of hard drives.  It is used for many other things than just
> > Myth. Current power consumption average is 94 watts last month. At
> > current electric rates that's less than 10.00 per month. I could most
> > likely get my average down more but have not taken the time to tweak it
> > any further. In my opinion the savings in $$ to get much lower is not
> > worth the trouble. A good efficient processor, which my bulldozer is not
> > as far as low power, at least an 80% rated power supply and putting the
> > drives to sleep when not used is the best bang for the buck in getting
> > the power usage down. It's even possible to shut CPU cores down on the
> > fly in Linux which can save some power. The drives seem to be 50% of my
> > power on boot the power spikes to almost 200 watts. Shutting down the
> > front ends when not in use is a better option also.  SSD drives allow
> > for fast turn on if your FE can wake from USB then you can wake it with
> > the remote. The only issue I have had with this is that any remote will
> > wake the front end. Even if the inte nt is not to use myth.
> > 
> > Dale
> > 
> > _______________________________________________
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> > mythtv-users at mythtv.org
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