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Re: [tor-talk] Number of tor users

I have test VoIP call through TOR, we have 54 % acceptable call for 5 % packet more than 400 ms. this result was for voip call with 2 tor relays. but now, I do not how to explain, correlation between acceptable call and available tor bandwidth. because of that, I try to calculate bandwidth per user based on data from metrics.torproject.org but my professor said it does not make sense. So I need to make test end-to-end to get bandwidth network then measure average.


On 29/05/2013 16:42, Karsten Loesing wrote:
On 5/29/13 3:38 PM, Maimun Rizal wrote:
Hi Karsten,
Thank you for fast reply.
So, now more clear for me to understand.
I try to calculate average Bandwidth per User based on Data from
metrics.torproject.org and I got around 30-40 Kbps/user. but it is total
bandwidth/average daily user. if I want to calculate end-to-end
bandwidth, the result i divide 3. with assumption we have 3 relays to
establish connection (Entry, middle and exit). each relays have equal
bandwidth (only assumption, in the reality, total bandwidth for 3 relays
are different). then, average bandwidth connection is 10 - 15 Kbps.
in VoIP case, we need 30-35 Kbps (iLBC and Speex codec) to have good
quality calls.
Ah, in that case user statistics won't get you very far.  I suggest you
try out whether your VoIP application works with Tor or not.

You may also be interested in this FAQ:


then my next question, does TOR ensure the bandwidth for users? at least
each user can get minimum bandwidth around 30 Kbps.
No, Tor doesn't ensure a minimum bandwidth per user.  Again, worth a try
if the provided bandwidth is sufficient or not.


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