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  #1  
Old 03-02-2008, 05:01 AM
hitboy hitboy is offline
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How much Bandwidth is used to download X Amout ...


How much Bandwidth is used to download X amount of hard drive space per file?

For example how could I figure out how much bandwidth is used to download a 1gb file. (im talking general averages)

Oh and sorry if this is in the wrong category just wasn't sure where to put it..

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  #2  
Old 03-02-2008, 05:52 AM
Steve_Arm Steve_Arm is offline
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For 1GB file, 1GB bandwidth plus some bytes for the GET request.

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Old 03-02-2008, 06:18 AM
hitboy hitboy is offline
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ah ok thanks!

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Old 03-02-2008, 07:34 AM
dotHostel dotHostel is offline
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Quote:
Originally Posted by Steve_Arm View Post
For 1GB file, 1GB bandwidth plus some bytes for the GET request.
Not really.

1GB file = 1024*1024*1024 bytes

payload = 1,073,741,824 bytes

adding protocol overhead (let's say 20%) = 1,288,490,188 bytes

1GB file ~ 1,3GB bandwidth usage

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  #5  
Old 03-02-2008, 12:46 PM
hitboy hitboy is offline
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great info thanks

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Old 03-02-2008, 02:39 PM
larwilliams larwilliams is offline
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People always forget about the TCP overhead for each connection. It is generally about 20% of the total you are trying to download. Mainly stuff such as acknowledges and requests for resending of packets.

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  #7  
Old 03-02-2008, 03:13 PM
dotHostel dotHostel is offline
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People also forget overhead when talking about data transfer rate.


Last edited by dotHostel; 03-02-2008 at 03:18 PM.
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  #8  
Old 03-02-2008, 06:23 PM
Shaw Networks Shaw Networks is offline
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Quote:
Originally Posted by dotHostel View Post
People also forget overhead when talking about data transfer rate.
And unfortunately ISPs never inform their customers that they won't actually achieve data transfer rates that match the total maximum throughput of their Internet connection.

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