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<p class=MsoPlainText>G'day Dio<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Please note that the reported usage I have stated is for
using "Mpeg4" and "DV" Streams. If you were to use
basic h261 streams, then streaming 8 separate streams could be done quite
easily.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>There are a couple of reasons to either use multiple
machines or a single machine:<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Single Node – Display, Capture and Audio all in one<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l1 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>Less machines to configure;<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt'><o:p> </o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l1 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>May struggle to run very large AG sessions,
though with the new Quad core CPU’s, this may be less of an issue;<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt'><o:p> </o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l1 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>May not have the power to use many capture
devices, or expansion slots to fit all capture cards;<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt'><o:p> </o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l1 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>May not have the power for H264, Mpeg4, DV and
HDV encoding and decoding, though as the results I forwarded recently, a new
Quad Core system does manage quite well;<o:p></o:p></p>
<p class=MsoListParagraph><o:p> </o:p></p>
<p class=MsoPlainText style='margin-left:72.0pt;text-indent:-18.0pt;mso-list:
l1 level2 lfo2'><![if !supportLists]><span style='font-family:"Courier New"'><span
style='mso-list:Ignore'>o<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>Though if you have any plans for streaming 8
h264/Mpeg4 streams, then you will need more than 1 system.<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt'><o:p> </o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l1 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>Multiple “vic’s” applications
cause difficulties – probably the biggest issue;<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Multi-Node<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l1 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>Provides more computational power and computer
resources to run very large sessions;<o:p></o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt'><o:p> </o:p></p>
<p class=MsoPlainText style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l1 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol'><span
style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]>More computers to configure and manage;<o:p></o:p></p>
<p class=MsoListParagraph><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>In my opinion, the computational power issues are becoming
less and less of an issue with the new quad core systems, unless you are wanting
to transmit extremely large number of “newer” codec video streams. <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>For me personally, I think one of the biggest issues is
that if you plan on sending 8 video streams, and vic can only transmitting one video
stream (video producer) at a time, then you would need to have open 8 instances
of vic open to find each of your video transmissions. Whereas, on a
multi-node configuration, you could have all the capturing done on one machine
and on the other, simply have a consumer process which can see all 8 streams
that your are transmitting and everyone else’s at the same time.
For simplicity, particularly for non AG users, this makes the system a lot
easier to use. Obviously, you could manage to setup some type of virtual
system on a single machine and have the same effect, but this is a lot more
difficult to setup and manage.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Anyway, I hope my comments are useful.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Cheers,<o:p></o:p></p>
<p class=MsoPlainText>Jason.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><span lang=EN-US>-----Original Message-----<br>
From: Dioselin Gonzalez [mailto:dioselin@gmail.com] <br>
Sent: Tuesday, 25 March 2008 06:50 AM<br>
To: ag-tech@mcs.anl.gov<br>
Subject: [AG-TECH] Single vs multiple machine node?</span><o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Hello (and greetings to all the people with whom I have
worked in the past!!),<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>In building our nodes I wanted to ask the community your<o:p></o:p></p>
<p class=MsoPlainText>thoughts/suggestions/experiences on having a single
machine node. We<o:p></o:p></p>
<p class=MsoPlainText>wonder if having a quad-core machine (instead of 3
separate audio,<o:p></o:p></p>
<p class=MsoPlainText>video and display ones) will be enough for sessions with
many<o:p></o:p></p>
<p class=MsoPlainText>attendees, streaming MPEG4 and running shared
applications. Jason<o:p></o:p></p>
<p class=MsoPlainText>Bell reported CPU usage of 40% with 4 video streams<o:p></o:p></p>
<p class=MsoPlainText>(http://www-unix.mcs.anl.gov/web-mail-archive/lists/ag-tech/2008/03/msg00045.html);<o:p></o:p></p>
<p class=MsoPlainText>we are planning to send up to 8 video streams.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>I'd appreciate your recommendations. Thanks much!<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Dio.-<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>-- <o:p></o:p></p>
<p class=MsoPlainText>Dioselin Gonzalez (SL: Chica Digital)<o:p></o:p></p>
<p class=MsoPlainText>Research scientist<o:p></o:p></p>
<p class=MsoPlainText>Louisiana Immersive Technologies Enterprise<o:p></o:p></p>
<p class=MsoPlainText>http://virtual-dio.com/<o:p></o:p></p>
<p class=MsoPlainText>http://www.lite3d.com<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
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