nanog mailing list archives
Re: maybe a dumb idea on how to fix the dns problems i don't know....
From: Victor Jerlin <victor () gsys se>
Date: Mon, 11 Aug 2008 02:26:04 +0200
Inline.. Chris Paul wrote:
Joe Greco wrote:But we only care about TCP connection setup time in *interactive* sessions (a human using something like the web). If you have a persistent connection to your dns server from your dns resolver on your browser machine, you just send the request.... no TCP setup there at all. You can even pool connections. We do this stuff in LDAP all the time.How does TCP resolution work in most resolver libraries? A TCP connection for each lookup? That is kind of dumb isn't it, speaking of dumb.... I actually don't know. Not much of a coder, so I'll let you coders check your code and get back to me on that...well.. maybe i'll fire up snort or wireshark and check it out later with some different dns libs....Pretending for a moment that it was even possible to make such large scale changes and get them pushed into a large enough number of clients to matter, you're talking about meltdown at the recurser level, becauseit isn't just one connection per _computer_, but one connection per _resolver stub_ per _computer_ (which, on a UNIX machine, would tend togravitate towards one connection per process), and this just turns into an insane number of sockets you have to manage.Couldn't the resolver libraries be changed to not use multiple connections?
And we'll change to IPv6 tomorrow!
CP
-- Victor Jerlin, CTO Gränslösa System GSYS HB Cell#: +356-9999-0125
Current thread:
- Re: maybe a dumb idea on how to fix the dns problems i don't know...., (continued)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Rob Payne (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Chris Paul (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... William Herrin (Aug 10)
- FW: maybe a dumb idea on how to fix the dns problems i don't know.... Tomas L. Byrnes (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Chris Paul (Aug 10)
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- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Chris Paul (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... list-nanog (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Chris Paul (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Joe Greco (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Chris Paul (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Victor Jerlin (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Chris Paul (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Cat Okita (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Chris Paul (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Joe Greco (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Chris Paul (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Joe Greco (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Michael Thomas (Aug 10)
- RE: maybe a dumb idea on how to fix the dns problems i don't know.... Tomas L. Byrnes (Aug 10)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Joe Greco (Aug 11)
- Re: maybe a dumb idea on how to fix the dns problems i don't know.... Colin Alston (Aug 11)
- RE: maybe a dumb idea on how to fix the dns problems i don't know.... Darden, Patrick S. (Aug 11)