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Chrysalis · 20-02-2011, 01:57

I am also curious why they need to download 4 at once, I can get 3.8meg/sec on one file only. The only reasons I would think of needing to do 4 are.

1 - to hide congestion as multi threaded in congestion conditions gives a bigger share of bandwidth.
2 - to hide rtt variance (jitter), if base latency is also high then it would mean need a higher tcp rwin to sustain higher speeds single threaded.
3 - if on windows XP or older with a small default rwin setting. (on gigabit lan it defaults much higher tho).

20-02-2011, 01:57	#1895
Chrysalis Inactive Join Date: Sep 2003 Posts: 12,047	Re: [Update] ALL 20>30Mb upgrade discussion I am also curious why they need to download 4 at once, I can get 3.8meg/sec on one file only. The only reasons I would think of needing to do 4 are. 1 - to hide congestion as multi threaded in congestion conditions gives a bigger share of bandwidth. 2 - to hide rtt variance (jitter), if base latency is also high then it would mean need a higher tcp rwin to sustain higher speeds single threaded. 3 - if on windows XP or older with a small default rwin setting. (on gigabit lan it defaults much higher tho).