On Mar 7, 2005, at 4:16 PM, [EMAIL PROTECTED] wrote:
We use a mixture of direct and indirect maps, all with ghosting turned on.
The problems we are seeing are evenly spread between the two types. Our
basic tools and home directories are indirect maps, the project data and
project specific tools are in a large direct map. All the maps are NIS (not
NIS+) served. All totaled we have about 1200+ mounts.
Sounds close to us in size, though we had to move our map into a file ages ago... we broke NIS at some point. A quick check shows more 3000+ mounts, but still 1200 is a lot. We've been using program maps so far though on linux, and haven't seen any of the same "the file isn't there.. even though it's there" issue on solaris at all.
We have also seen some problems on the Solaris boxes in a timeframe similar
to our Linux problems. We have been getting more RPC timeouts and NFS
server not responding errors in the messages files. And the users have been
complaining of, what they have termed, "pausenia" and "stuttering".
Pausenia is where the user types a command and the shell locks for 15 to 60
seconds before anything happens. Stuttering is a file not found error,
followed by the file being there when the user immediately (after cursing
and retyping) reissues the command. The one difference we see on the
Solaris side is that the automounter seems to self-recover.
Is the pausenia on solaris happening near the top of the hour? We've had a similar problem that seems to occur when automount on solaris does it's hourly check/flush where it parses the maps again. We noticed when that happens that automount takes up a lot of CPU too.
We don't see the stuttering so much since it only seems to occur when a batch lsf job is submitted, and not when the user is working interactively.
We have turned off the "/net" program map because there are too many
problems with things staying mounted, overly long exports lists from the
filers, etc. and we don't really need it on every machine.
Ah yes.. that's why I had to write this huge, ugly, shell script that scrubs hosts trying to find and flush such hung/gone mounts. If you ever want to see it.. let me know. ;) I found I could force umount most of the hung mounts by spoofing the IP of a missing host on an aliased interface, though I had to disable tcp mounts on /net for that to work.
--
Mike Marion-Unix SysAdmin/Staff Engineer-http://www.qualcomm.com
Drew: "Violence doesn't solve anything? World War I. World War II. Star Wars.
every Super Bowl. Who says violence doesn't solve anything?!" ==> Drew Cary Show
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