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- Path: sparky!uunet!gatech!mailer.cc.fsu.edu!uflorida!kluge!max.fiu.edu!kzin!ibarrac
- From: ibarrac@kzin.fiu.edu (Carlos A. Ibarra)
- Newsgroups: comp.sys.sun.admin
- Subject: Amd is not perfect
- Message-ID: <Bs88Cu.7zp@fiu.edu>
- Date: 31 Jul 92 00:07:41 GMT
- Sender: ibarrac@kzin (Carlos A. Ibarra)
- Organization: Florida International Univ.
- Lines: 17
-
- For those people switching to the Amd automounter, a word of warning.
- We run amd on many of our machines and on our file servers. Everybody's
- directory is accessible through /homes/username, the /net/host map is
- enabled, plus other filesystems are reachable through /home/filesystem.
-
- Around once a month, all the processes referencing files through amd on
- one of our servers get stuck. A ps shows them all in DW state. Meanwhile,
- amd is happily running fine. The load increases monotonically. Each new
- process which attempts to access a filesystem through the automounter,
- gets stuck in kernel wait. Sometimes, if we are lucky, this stops by itself.
- The load goes back down and everything works fine. Other times we have
- to resort to a reboot. It looks to me like some kind of deadlock, but
- I have not been able to find out where the cyclical wait occurs. It may
- also be an amd bug.
-
- This used to happen a lot before with Sun's automounter. Amd reduced, but
- did not eliminate, the frequency of this problem.
-