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Re: [tor-relays] tuning MaxAdvertisedBandwidth for CPU



> When I was operating an exit node...

Maybe I mis-read your original post, but I thought you *were* running an exit node. That's really the only scenario that requires a lot of name resolutions. An entry or middle nodes doesn't need much DNS traffic because they are only passing along packets.

An exit node with a lot of connections needs lots of name resolutions, making fast DNS a necessity. Whether that's accomplished with a local caching name server or some nearby name server depends on the resources you have available to you.


On 05/26/2012 11:20 AM, markus reichelt wrote:
* Steve Snyder<swsnyder@xxxxxxxxxxxxx>  wrote:

Maybe you're bottlenecked on DNS resolution?

Interesting, that's news to me. When I was operating an exit node I
remember such log entries popped up on a regular basis.  I also
thought the CPU was the bottleneck, but still tried tweaking things;
a rather unsuccessful quest. It just never occured to me DNS might be
an issue.

Do you have a link to further read up on things? Is this a FAQ by
now?  And what's the solution; running a local caching nameserver?
Thanks.



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