hi!
> From: [EMAIL PROTECTED]
> Here's a script I've used - I use ssh only to set up "hose" on the
> other machine, and both machines share a common filesystem over NFS.
> Here yuv4mpeg2 data flows over the netpipe, and the (much smaller)
> mpeg2 data flows back over NFS.
I was thinking of perhaps one day writing a simple tcpmux service
that'd accept the encoding parameters and commandline over the
connection.
> the overhead of the IP/TCP work the kernel is doing. Start 'top'
> in another window and watch 'rshd' sometime.
>
> Then I'm glad I was too lazy to set it up on the home network.
It made a substantial difference on the 1GHz G4 based Powerbook
> On a multi cpu system there's not much, if any, difference between
>
> But then aren't you "wasting" your other CPU? Why would you need to
Not really. Only part of the other cpu(s) is used to run the
ssh/rshd process - the remainder of the cpu can be used to run
the medianfilter or y4mscaler or whatever
> use rsh if you had multiple CPU's right in the box? (Oh - P3-800.
> Gotcha)
Yep - there's that too :) I used a couple dual P3-800 systems
fairly effectively - one would run the 'smil2yuv | y4mscaler |
yuvdenoise' and then hose/faucet the data over to the other system
which would run 'yuvmedianfilter | mpeg2enc'. Worked fairly well
but was still slooowwww compared to a 2+GHz P4 or Athlon.
> Dual systems are a lot easier since they will auto balance everything
> and have much higher communication bandwidth. In a quad system though
> you might need to parallelize yuvdenoise or else everything else will
> be waiting on it.
Actually I've found that a quad cpu system is very handy. Granted
the only quads I have around are the older P3/Xeon ones but with
a lengthy pipeline there's not a whole lot of cpu left.
Of course the other thing a faster quad system would be good for
is running two encoding sessions at the same time <grin>
Cheers,
Steven Schultz
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