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World Community Grid Forums
Category: Active Research
Forum: Africa Rainfall Project
Thread: Download speed limitation? [CLOSED] |
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Thread Status: Active Total posts in this thread: 5
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1684 Status: Offline Project Badges: 
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Since a couple of days, I notice some significant download speed limitations.
----------------------------------------Because I am lucky enough to have 1 Gb/s download available (FO), an ARP WU requires usually about 30 s to download. Now, I come back to the same download duration like the ADSL era, i.e. about 15+ minutes / ARP WU. I speedchecked the Internet connection and everything seems to be fine. My guess is that WCG experiences some bandwidth restrictions internally or on CDN side. Cheers, Yves ---------------------------------------- [Edit 2 times, last edit by KerSamson at Mar 13, 2021 9:06:34 AM] |
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adriverhoef
Master Cruncher The Netherlands Joined: Apr 3, 2009 Post Count: 2346 Status: Offline Project Badges: 
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Yves, I've checked my latest two ARP1-downloads and I'm seeing no such problem that you describe. The latest one was around 02:50 CET (your timezone), 01:50 UTC.
Mon 08 Feb 2021 02:50:46 CET | World Community Grid | Sending scheduler request: To fetch work.Adri |
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1684 Status: Offline Project Badges:
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Sometime there is no speed limitation, sometime it is very slow: below 3 examples of 3 machines.
----------------------------------------Normal case --- Example #1 --- Example #2--- Example #3--- Cheers, Yves |
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sam6861
Advanced Cruncher Joined: Mar 31, 2020 Post Count: 107 Status: Offline Project Badges: 
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The default BOINC setting is to download 2 at a time, like this. Start, start, finish, start, finish, start, finish finish. Those that I see 10 "Started download" at the same time, then 10 "Finished download" have probably adjusted the max file transfers?
There is BOINC config to change number of simultaneous download. max_file_xfers and max_file_xfers_per_project. Higher numbers can speed up downloads, but can overload and lag your internet connection if speed is slow. |
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1684 Status: Offline Project Badges:
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I should have tagged the post as [CLOSED].
----------------------------------------At the time, I wrote the post, it was significant limitations which disappeared about 12 hours later. The problem was really a very limited bandwidth, not caused by the 2 download at a time setting. Cheers, Yves |
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