North American Network Operators Group|
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Re: BIND & root servers
Hello. Welcome to BIND-NANOG, the mailing list where North American BIND problems (rather than BIND problems in general) are discussed among network operators. If you would prefer to just discuss general network operations issues, sorry, there is no such mailing list. If you would prefer to just discuss BIND problems, see usenet:comp.protocols.dns.bind. Now for our topic: > With the root servers blowing up, someone down here told me that our BIND > 8.1 server was looking up less names than other servers. Of course I > denied it, but he coaxed me into running a few tests. > > I tested 3 servers, a BIND 8.1 server, a BIND 4.9.5 p1 server, a BIND > 4.9.5 server, and a BIND 4.9.3 server. > > I tested a total of 100 uncached domains. > > 16% of the domains couldn't be looked up by the BIND 4.9.3 server > 16% of the domains couldn't be looked up by the BIND 4.9.5p1 server > 17% of the domains couldn't be looked up by the BIND 4.9.5 server > 26% of the domains couldn't be looked up by the BIND 8.1 server > > All queries were sent to all the nameservers at the same time. I'm not > sure if this is by chance, but it seems that BIND 8.1 isn't doing as good > a job as the older 4.9.x servers. > > Can anyone confirm this? Without knowing exactly what test you ran, I suspect that noone will be able to confirm it. However, I can say that BIND-8.1.1 is less promiscuous than its predecessors, and so it is likely to actually reflect underlying origin server problems more directly than its predecessors. (This is part of the cost of preventing AlterNIC, et al, from polluting your cache.) If you would also run your test (whatever it is) against BIND-4.9.6 I suspect that the results will be similar to BIND-8.1.1 (which it's not clear that you used; BIND-8.1 has already been deprecated by its first patch release.) We now return you to NANOG-FIBRE, wherein the world wide fibre situation and its possible effects on North American network operations are discussed hourly.