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World Community Grid Forums
Category: Support
Forum: Suggestions / Feedback
Thread: improve Download <-> run ratio for Modem/ISDN users |
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Thread Status: Active Total posts in this thread: 7
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raether
Cruncher Joined: Dec 4, 2004 Post Count: 3 Status: Offline Project Badges: 
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have found that after initial download of program (am running boinc), I end up getting file sizes of approx. 5MB for each run. calculate that with ISDN speed: 20MB/h, gives me 15 min download for a file my machine will crunch in less than two hours.
To be able to run for a day or two, would need to be online for hours! Is there a chance to put more infos in the program itself, or make one big download in fornt, and then only small ones for the workunits? Sometimes, I am getting smaller workunits, is there a chance to make that configurable, so that users with small bandwidth can choose to get smaller sized workunits? Regards, Bernhard |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
There is a lot that I do not know about file download / upload sizes. My first thought is that running the UD Windows client with FAAH-only preference produces the smallest file transfers. Perhaps somebody has the figures for each configuration and can give them to us?
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Viktors
Former World Community Grid Tech Joined: Sep 20, 2004 Post Count: 653 Status: Offline Project Badges: 
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have found that after initial download of program (am running boinc), I end up getting file sizes of approx. 5MB for each run. calculate that with ISDN speed: 20MB/h, gives me 15 min download for a file my machine will crunch in less than two hours. Most of that initial download is the Rosetta or Autodock program which is downloaded only the first time and then cached in your install directory. Additional work units for the project will have much smaller downloads. If you have specified a minimal amount of disk space for use by the agent, it might be possible that the download has to be repeated when switching between projects. You can go to MyGrid on the web site and adjust the Hard drive space value under Device Manger - Default profile. Also, ISDN should be around 128kbps or more which should give you something around a 5 minute initial download. The speed you computed sounds more in the range of a dial-up analog modem unless you somehow are not using both ISDN B channels or have some other slowdown. |
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raether
Cruncher Joined: Dec 4, 2004 Post Count: 3 Status: Offline Project Badges:
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Hello Viktors,
I did realize that initial download is usually higher than the workunits. But I tried to run boinc with WinXP an Linux, and found on both that every WORKUNIT has usually five different files, of which three are really small, one has 1.5MB, the other more than 3.5MB. My fastest machine will finish that WU within 1h30, then tries to upload a result file of 1.78MB So, I compare that with one line of ISDN (would have to pay twice if I use two lines), 64,000BPS, and I end up with 15min, even 20min for the file upoad/download scenario, and especially when I get up to six WUs that will keep my internet line busy for close to two hours, but around 6*1h30=9h of work, the computer requests more WUs. . That's what I wanted to point out. Seems to me as if the windows client keeps my computer busy for over 24hours, without that download time. . Please don't tell me I am the only one still connecting with 6400BPS  |
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raether
Cruncher Joined: Dec 4, 2004 Post Count: 3 Status: Offline Project Badges:
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Hello Viktors,
I did realize that initial download is usually higher than the workunits. But I tried to run boinc with WinXP an Linux, and found on both that every WORKUNIT has usually five different files, of which three are really small, one has 1.5MB, the other more than 3.5MB. My fastest machine will finish that WU within 1h30, then tries to upload a result file of 1.78MB So, I compare that with one line of ISDN (would have to pay twice if I use two lines), 64,000BPS, and I end up with 15min, even 20min for the file upoad/download scenario, and especially when I get up to six WUs that will keep my internet line busy for close to two hours, but around 6*1h30=9h of work, the computer requests more WUs. . That's what I wanted to point out. Seems to me as if the windows client keeps my computer busy for over 24hours, without that download time. . Please don't tell me I am the only one still connecting with 64000BPS |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hello raether,
That 3.5 MB file should not be there. That is the application program, which should only download once. Try piping your Linux display output to a file so we can read what is going on. The FAAH work units are much smaller than the HPF units, but they will not be ready for BOINC until late January (we hope). mycrofth |
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Viktors
Former World Community Grid Tech Joined: Sep 20, 2004 Post Count: 653 Status: Offline Project Badges:
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... So, I compare that with one line of ISDN (would have to pay twice if I use two lines), 64,000BPS, .... Please don't tell me I am the only one still connecting with 64000BPS Oh... I thought you were talking about the UD windows agent instead of Boinc. The Boinc agent does not currently compress the download and upload files, so that makes the work unit data larger. We will be looking at adding compression in some manner in the future (sorry, no date yet). Second, I used ISDN myself until DSL became available on my phone line. DSL was a lot cheaper and way way faster, for me. Plus, finding good ISDN modems was getting rather difficult and DSL makes it very easy using ethernet. You might want to look into it. |
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