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Upload/download help
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Mac Elite
Join Date: Dec 2001
Location: Windham, ME
Status:
Offline
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hey any one have an idea why when I upload my download gets REALLY laggy and slow? happens with web, carracho, sending files in iChat. Any one else get this also or have an ide ahwo to fix it? I have done the unix optimizing stuff already and I still get the slow down.
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Professional Poster
Join Date: Sep 2002
Location: New York, NY
Status:
Offline
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Well, generally you only have a certain amount of bandwidth available.. If you are using some of it for uploading, your downloads will slow because there is less bandwidth for them.
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Vandelay Industries
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Mac Elite
Join Date: Dec 2001
Location: Windham, ME
Status:
Offline
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yes but, my uplaod maxes at 120k or so, and i get 2.5 meg downlaod, but when i uplaod and download my download goes to like 1-10k. now thats not normal.
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Professional Poster
Join Date: Nov 2000
Location: Tasmania, Australia
Status:
Offline
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modem, ethernet, ISDN, DSL, Satellite, Cable ????
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Mac Elite
Join Date: Dec 2001
Location: Windham, ME
Status:
Offline
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Dedicated MacNNer
Join Date: Feb 2002
Location: Dallas
Status:
Offline
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Originally posted by Liquidity X:
Cable modem
I read somewhere that the way TCP/IP was originally designed was that when doing more than one function at a time (upload/download in this case), the speed automatically gets capped at the slower of the speeds. I hope that made sense.
turboSPE
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Mac Elite
Join Date: Dec 2001
Location: Windham, ME
Status:
Offline
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hmmm very 1990, they should get on creating a new system.
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Mac Elite
Join Date: May 2002
Status:
Offline
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Downloading actually requires a little bit of uploading - your computer has to send responses to the server, along the lines of "Yep, got that packet, and that one, yeah, give the next one". If all of your upload is being used doing something else, your download will be horribly slow because it can't send the responses ("ACKs") fast enough. This is a problem for anybody who has a faster download than upload. 
I read somewhere that the way TCP/IP was originally designed was that when doing more than one function at a time (upload/download in this case), the speed automatically gets capped at the slower of the speeds. I hope that made sense.
This, fortunately, is not true.
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[vash:~] banana% killall killall
Terminated
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Mac Elite
Join Date: Dec 2001
Location: Windham, ME
Status:
Offline
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Well i set it to full duplex, which i hadn't had befor, any other ideas?
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Professional Poster
Join Date: Mar 2001
Location: Seattle, WA
Status:
Offline
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Originally posted by Liquidity X:
Well i set it to full duplex, which i hadn't had befor, any other ideas?
There are no ideas here. I have this same problem with DSL and as Gul Banana said, its because of the ACK packets, theres nothing you can do about it - its your ISP thats at fault I believe.
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