Hi Steve,
Good question. We used that setting previously and it apparently did not
hurt. We are not using any of those tweaks apart from the updated
sysctl.conf at the moment.
Let me know about your findings!
--
Moritz Bartl
https://www.torservers.net/
Am 17.08.2011 17:31, schrieb Steve Snyder:
The config page at torservers.net advises increasing the TX Queue Length from the default
1,000 to 20,000. For a differing opinion see the assertion that this increases latencies
and hampers network congestion recovery ("bufferbloat"):
http://www.cyberciti.biz/faq/gentoo-centos-rhel-debian-fedora-increasing-txqueuelen/
I'm running an exit node on a 100Mbps network (multi-core CPU on RHEL5), and
typically have 600 - 800 connections at any given time. TorStatus usually
reports my throughput at 700KB to 800KB per second.
I suspect that the 20,000 recommendation pertains to Gbit Ethernet. Still,
though, is the default of 1,000 adequate for my Tor traffic?
More generally, I haven't tweaked my networking (system network buffer sizes,
etc.) because it is unclear to me what recommendations are appropriate for exit
nodes running contemporary versions (v0.2.2.30+) of Tor. Reliable benchmarking
can't be done because the system load varies with traffic at any given time.
Is there a way to prove empirically that this or that adjustment to the system
configuration really has an effect on the performance of a Tor relay node?
Thanks.
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