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verheyde
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Belgium
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How does BOINC determine network bandwidth

I selected to work on the african climate project, but get messages back that my computer needs at least 63.5 Kbps of bandwidth, and only reports 59.5 Kbps.
I'm attached at home via an ADSL line which is 4.6 Mbps down / 512 kbps up. When at the office I'm linked to the internet over a dual 100Mbps link. Should be enough...
(OS: XP, BOINC Client : 5.8.15, Intel core 2 duo processor in a laptop with lots of RAM and disk space)
[Sep 27, 2007 7:27:20 AM]   Link   Report threatening or abusive post: please login first  Go to top 
Sekerob
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Re: How does BOINC determine network bandwidth

knreed explains here that the value presently is not properly recorded! The 63.5 required is already a reduction from 75 or so when the project started.

The office internal is meaningless as is any LAN internal speed. What is relevant is the actual measured data throughput at the device. You can see that in the BOINC message tab window where every file up/downloaded has a transfer rate attached. Most of mine only show 5-20kb/sec (and i have near 20mbit down / 480kb up per my Router enquiry screen).

Please check the client_state.xml file (BOINC program dir) for a section like below:
<net_stats>
<bwup>83990.9</bwup>
<bwdown>144088</bwdown>
</net_stats>


In order to fool the server, one time, exit BOINC, open the client_state.xml with a flat text editor like notepad and amend the <bwdown> value to say like 100000. Save, making sure the name stays 'client_state.xml' and restart BOINC. Watch that value as it is influenced by connection to any project your client is attached to.

There is really little work, like 820 units per batch for AC@H, so chances of getting an AC@H job are small. Make thus sure to keep a short connect time and select the 'if there is no work option' in your My Project profile, or your client sits doing nothing.
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[Sep 27, 2007 8:28:14 AM]   Link   Report threatening or abusive post: please login first  Go to top 
verheyde
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Re: How does BOINC determine network bandwidth

I understand the LAN speed (1Gbps in both cases) has no impact on the speed determination. The office LAN is connected via dual 100Mbps links to the internet, so the bottleneck should not be there either.
Speed tests (through different sites offering to measure internet speed) show very healthy numbers. The BOINC client does not.
Anyway, that reduces my chances to work on that project. I'll try to fiddle with the .xml file, just to see, but will also re-enable work from any project.

Thanks.
[Sep 27, 2007 9:30:33 AM]   Link   Report threatening or abusive post: please login first  Go to top 
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