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What maximum speed can I expect from using a VPN?
Reuben:
Now you may be wondering, how come I don't get my maximum advertised speed even on the well seeded ubuntu torrent?
This faq assumes that you have
a) A perfect line or close to perfect one (good SNR and attenuation)
b) No routing issues with TM
c) No other background programs that use the internet running
d) No seeder/peer ratio issues
e) TCP optimization has been performed
Please check the speed troubleshooting guide if you wish to know how to tune your computer to close to achieving these conditions.
Most ISPs use the PPPoE protocol. This protocol has some overhead which results in around 10-15% loss in effective throughput. This PPPoE overhead is ALWAYS there regardless of VPN or not. Even your HTTP downloads are still subject to this.
Furthermore, the use of a proxy/VPN results in some overhead as well. We estimate this to be in the 10% region.
Now the figures given below are more or less theoretical and is still subject to loss on your ISP's line and I have not even factored in BT overhead or upload saturation.
1024 kbit Line (1 Mbit)
--- Quote ---1024 kbit = 128 kB/sec
Take off PPPoE overhead (15%)
0.85 x 128 = 108.8 kB/sec
Now take off VPN/proxy overhead (around 10%)
0.9 x 108.8 = 97.9 kB/sec (Expected max speed roughly)
--- End quote ---
512 kbit Line
--- Quote ---512 kbit = 64 kB/sec
Take off PPPoE overhead (15%)
0.85 x 64 = 54.4 kB/sec
Take off VPN/proxy overhead (10%)
0.9 x 54.4 = 49.0 kB/sec (Expected max speed roughly)
--- End quote ---
1536 kbit Line (1.5 Mbit)
--- Quote ---1536 kbit = 192 kB/sec
Take off PPPoE overhead (15%)
0.85 x 192 kB/sec = 163.2 kB/sec
Now take off VPN/proxy overhead (around 10%)
0.9 x 163.2 = 146.9 kB/sec (Expected max speed roughly)
--- End quote ---
2048 kbit Line (2.0 Mbit)
--- Quote ---2048 kbit = 256 kB/sec
Take off PPPoE overhead (15%)
0.85 x 256 kB/sec = 217.6 kB/sec
Now take off VPN/proxy overhead (around 10%)
0.9 x 163.2 = 195.8 kB/sec (Expected max speed roughly)
--- End quote ---
4096 kbit Line (4.0 Mbit)
--- Quote ---4096 kbit = 512 kB/sec
Take off PPPoE overhead (15%)
0.85 x 512 kB/sec = 435.2 kB/sec
Now take off VPN/proxy overhead (around 10%)
0.9 x 435.2 = 391.7 kB/sec (Expected max speed roughly)
--- End quote ---
┼65□™ [579]:
I remember reading somewhere that DHT costs another 4kB/s or something like that. However, you get a lot more peers by enabling DHT unless you manage to get a good source tracker.
jackhorace:
any one try soho package already? I am a Soho user .
Reuben:
There's little difference between normal streamyx and soho streamyx.
Perhaps better contention rate with soho but even that is debatable.
This means it should work with your SOHO streamyx with no problems as it is basically the same setup.
DarthVaderAsip:
it wont work if using SDSL rite?
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