Great! Thanks for the update, Chris.<br><br>Kim<br><br><div class="gmail_quote">On Sun, Mar 2, 2008 at 7:05 PM, Chris Ball <<a href="mailto:cjb@laptop.org">cjb@laptop.org</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>
<br>
Daf and I got the school server jabberd/shared roster working today.<br>
We connected/registered 32 laptops to it with mesh TTL set to 1 for<br>
broadcast, and they were all able to see and join a shared chat session<br>
with each other. The workload on the spectrum analyzer increased from<br>
18% (no-one connected) to 26% (all connected). The chat session is<br>
consistent -- no-one is dropping out and new messages are seen by each<br>
laptop, with a few seconds of lag.<br>
<br>
With the mass chat session still running, we shared a 500KiB PDF. First<br>
we joined the shared Read session with one laptop, and the download took<br>
16 seconds to complete. We then joined two more laptops at once, the<br>
first download took 26 seconds and the second finished at 30 seconds.<br>
Five more at once: all finished around 1m00s. Ten more at once: the<br>
first finished at 2m18s, the last finished at 2m40s. There were no<br>
failures downloading the PDF. The sharing was unicast TCP, with mesh<br>
TTL set to 1, which explains the slightly worse than linear increase in<br>
download time for more laptops downloading at once.<br>
<br>
This is much more anecdotal than the full test plan, but we thought the<br>
testers currently in Peru would want to know what they can expect from<br>
the school server setup ASAP. We don't have more laptops upgraded and<br>
ready to join the network yet, but we don't have any reason to believe<br>
we've saturated the network -- with the PDFs downloaded and Chat still<br>
running, the duty cycle on the spectrum analyzer is now at 28%. (In<br>
general, wireless networks seem to start degrading around 40%.)<br>
<br>
- Chris and Daf.<br>
<font color="#888888">--<br>
Chris Ball <<a href="mailto:cjb@laptop.org">cjb@laptop.org</a>><br>
</font></blockquote></div><br>