[mythtv-users] Network speed.

Ian Trider iantri at gmail.com
Mon May 30 13:43:31 UTC 2005


> I'm just wondering if the 10 Mbit speed would be enough to run 3 or 4
> frontends if the backend was on the 100 Mbit port.  I know straight number
> wise, since 10 Mbit is fast enough, that you should be able to put 10 ports
> against the 1 100 Mbit one, but if there's one thing i've learned in 5 years
> as a CS major, it's that the numbers in computing (especially when talking
> about the retail side of things) are skewed in favor of looking better than
> it is...

Nope, sorry.

10mbit is definitely not going to do it.  Let's factor in network
overhead and manufacturers' exageration (as you've pointed out) into
these numbers:  you're going to get 6mbit tops, which is 750 kilobytes
per second MAX not accounting for protocol overhead for NFS/samba etc.

If you recording MPEG-2 (from say a PVR-350) at a bitrate of, say,
4500kbps, this is simply not going to work, even with only one client
connected; the network won't be able to sustain the video stream.

So, in agreement with the other responses, go for at least a 100mbit
switch.  They are REALLY cheap nowadays, and should be considered the
BARE minimum for what you want.

If you wanted to do HDTV, that's (IIRC) roughly 25mbits per second,
which isn't going to do on a 100mbit network (which, accounting for
various factors, is going to be closer to 60 mbit, probably..).

Sorry,
Ian Trider
iantri at gmail.com


More information about the mythtv-users mailing list