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- Newsgroups: comp.sys.sun.admin
- Path: sparky!uunet!darwin.sura.net!news.duc.auburn.edu!netman!elling
- From: elling@eng.auburn.edu (Richard Elling)
- Subject: Re: DNS & Resolver. Things Sun should do.
- Message-ID: <1992Jul29.163357.3344@news.duc.auburn.edu>
- Sender: usenet@news.duc.auburn.edu (News Account)
- Nntp-Posting-Host: netman.eng.auburn.edu
- Reply-To: elling@eng.auburn.edu
- Organization: Auburn University Engineering
- References: <jpc.712372686@avdms8.msfc.nasa.gov>
- Date: Wed, 29 Jul 1992 16:33:57 GMT
- Lines: 28
-
- In article 712372686@avdms8.msfc.nasa.gov, jpc@avdms8.msfc.nasa.gov (J. Porter Clark) writes:
- >
- >Sure. If you add a new record to DNS relatively close (in terms of
- >delay) to the host, you will get a ypmatch. No problem there. But
- >let's say somebody out in some part of the net quite distant to you
- >adds a new host to his DNS over there. Now try to ftp to it or ping
- >it. Maybe you folks out there have some sort of special relationship
- >with the Internet somehow, but that DNS lookup is going to take a
- >little while to ripple through the DNS hierarchy from where I am.
- >Chances are very good that the first lookup is going to fail for me.
- >If I wait a few seconds after the first lookup and try again with DiG
- >or nslookup, it will usually work. But the problem is, NIS has already
- >learned from its earlier failure and will never return an IP address
- >for that hostname until ypserv and ypbind have been restarted. cd
- >/var/yp and make will *not* work, either.
-
- I believe the "bug" here is that the misses are cached. There is no
- publically documented way to flush the cache without killing and
- restarting ypbind (yuk!) Also, the cache timeout is unknown. My
- experience has been that the timeout is about 30 minutes. So I find
- something else to do in the interim... like read news :-)
-
- ---
- Richard Elling Manager of Network Support
- Auburn University Engineering Administration
- richard.elling@eng.auburn.edu KB4HB [44.100.0.72] (205)844-2280
- Houston, Tranquility Base here. The Eagle has landed!
-
-