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Accelerate the Download


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#1 davzell

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Posted 05 November 2009 - 03:45 PM

Hello, i'm french exuse my bad english :thumbup:

I use TFTPD32 to boot bartPE img by pxe boot but ut's very slowly (4min for 170mo)

I have see this line in the faq

Q: Can i speed up transfers ?
Q: How do i tune the anticipation window ?
A: The TFTP protocol has not been designed for efficiency and never use full bandwidth. However you can increase transfer rate by increasing the size of the message.
Moreover, you can enable an anticipation window of two to five messages. Tftpd32 will send data packets without waiting for acknowledgements, and a file can be transferred twice as fast as other servers.


but where can i change the size of my packet ?

I have enable the "anticipation". Is it great ?

PrtScr_capture.jpg



Thank you in advance

#2 was_jaclaz

was_jaclaz

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Posted 06 November 2009 - 11:44 AM

Here:
http://people.math.j...scue/README.pdf

it is said that the "anticipation" size can be brought to 4,096 bytes, here:
http://www.911cd.net...o...=9685&st=79
it is said that reducing it's size to 256 bytes allows for faster downloads.

This Russian site:
http://unattendedxp....ris/progs.shtml
http://translate.goo...t...it&ie=UTF-8
Recommends a size of 14,320 bytes:
Posted Image

I guess you need to experiment with different values. :thumbup:

:dubbio:

jaclaz

#3 davzell

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Posted 06 November 2009 - 02:00 PM

thx for your answer.

I have try this différent "size" on my virtual machin (sun virtualbox) but if i try above 2048bytes
it does not work.

I will try on a physical computer to see.

#4 Polybius

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Posted 29 January 2010 - 05:56 PM

Booting in Virtual PC, I got booted to PE 3.0 in just under 2 minutes, using 14,320 bytes. Unchecked, 5 minutes. 256 bytes, well over 5 minutes.




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