> Il giorno 14 apr 2020, alle ore 14:48, teor <t...@riseup.net> ha scritto: > > Hi, > >> On 12 Apr 2020, at 10:10, Mario Costa <mario.co...@icloud.com> wrote: >> >> I’m running a guard relay from my home connection on a Raspberry Pi 4. My >> internet connection is 1000/100 Mbps, and I thought I’d allocate half of the >> upload bandwidth for the relay. Then I set RelayBandwidthRate to 10 MB/s, >> because I thought that Tor would upload 5 MB/s and download 5 MB/s. > > You have an asymmetric connections and Tor is a relay network. So your > relay's speed will be limited by the slowest of your upload and download. > > Tor also assumes your connection is full duplex. (That is, there are separate > limits of 10 MB/s up and 10 MB/s down.) > > You should set rate to the highest sustained bandwidth you're happy for Tor > to use. Tor could use that much bandwidth for seconds or hours. That > bandwidth should be lower than your connection bandwidth. (The minimum of > your upload and download.) > >> However, the maximum observed bandwidth was always about 6 MB/s. I’d like to >> know what could cause this low observed bandwidth. I don’t think it’s the >> Raspberry Pi, because CPU usage is always low and it has a Gigabit >> connection to the router. > > Where are you seeing this observed bandwidth? > > Tor reports its observed bandwidth over the busiest 10 second period each day. > > 60% of the rate is actually a pretty high load, because Tor is a low-latency > network. (Once utilisation gets over around 10%, latency starts increasing.) > > If your connection is a high latency connection, Tor may send bandwidth to > lower-latency connections. > > You can read a similar thread here: > https://lists.torproject.org/pipermail/tor-relays/2020-April/018348.html > <https://lists.torproject.org/pipermail/tor-relays/2020-April/018348.html> >> The router itself easily reaches Gigabit speeds, so 10 MB/s should be a >> breeze. Could it be the number of connections? nyx indicates that the >> connections are always about 4000. If this is the case, how can I know if >> the connections bottleneck is the router or the Raspberry Pi? > > 4000 seems pretty normal. There are only around 6000 relays. > Check your tor, kernel, and router logs for TCP warnings? > >> Additionally, I’d like to ask for a rule of thumb for setting the >> RelayBandwithBurst. I set it to 20 MB/s because I’m ok with the relay using >> the whole upload bandwidth (about 10 MB/s, or 100 Mbps) for short periods of >> time, but as I already explained I’m never seeing such speeds. > > Setting your burst higher than your connection speed can cause latency or > packet drops. Tor will allocate less bandwidth to slow or unreliable relays. > > You won't see the burst in Tor's observed bandwidth. The burst is over 1-2 > seconds. The rate is averaged over a few seconds. Observed is over 10 seconds. > > Tor will compensate for a burst by having a few slow seconds afterwards. > > Set the burst to the highest speed you ever want the relay to use over 1-2 > seconds. The burst should be equal to or lower than your connection speed. > (In your case, the lowest of your upload and download speed.) > >> For reference my relay’s fingerprint is >> F942EE73F1B8E39125F617FA85E80E4C9E540A2E. > > If you want Tor to use more bandwidth, try setting rate and burst to 10 Mbps. > > That way, you won't be causing congestion or packet drops. > > You may have to wait for a few weeks or months for your bandwidth to > stabilise. > https://blog.torproject.org/lifecycle-new-relay > <https://blog.torproject.org/lifecycle-new-relay> > > T > > _______________________________________________ > tor-relays mailing list > tor-relays@lists.torproject.org > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
Thank you, I mistakenly thought the the Bandwidth limits were up+down, this really clarified many things. > Il giorno 14 apr 2020, alle ore 17:21, torjoy > <south_america_brid...@protonmail.com> ha scritto: > > Hi Mario, > > I'm having same trouble with raspberry pi 3b... I use Wi-Fi connection with > high throughput. My local connection can copy files up to 15MB/s to this RPi. > It is a USB adapter (mediatek MT7601). I'm asking myself that speed on tor > network shouldn't be more than 2 MB/s. I've limited the maximum in 3,2 MB/s > and burst to 4,3 MB/s, my connection here in Brazil is just of 240 Mb/s // 24 > Mb/s... At least 2,2 MB/s should be reached in the measurements i guess. In > the past i shouldn't pass from 600 KB/s thus because my CPU consumption with > TOR was near to 100%. But i've set more parallel threads in torrc and > recompilled my openssl to support it the linux crypto engine, that can handle > faster crypto operations. With this i've enabled hardware acceleration on > torrc and reached a little bit more than 1MB/s in the measurements. > > Luiz > > > Sent with ProtonMail Secure Email. > > > > _______________________________________________ > tor-relays mailing list > tor-relays@lists.torproject.org > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays As the guys explained to me you will not reach constant full load, and if your relay is fairly new it can take some time. Plus, I don’t think that wifi is the best choice for a relay. Even if your RasPi 3 doesn’t have a Gigabit adapter, a 100 Mbps ethernet connection should be more than enough for your desired Bandwidth limits. -m
_______________________________________________ tor-relays mailing list tor-relays@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
