On Tuesday, January 31, 2012 09:37:52 AM Mark Wendt did opine: > On 01/31/2012 09:02 AM, gene heskett wrote: > >> NFS can use up all the CPU cycles trying to get a remount. I've seen > >> that quite a few times, especially at boot time, when a system is > >> trying to do an NFS mount on another system that's down at the time, > >> and it just sits there forever until the other machine comes back > >> up. The soft and retrans option allows the boot to continue after > >> so many attempts, and then you can fix the problem once it's fully > >> booted. > >> > >> Mark > > > > But, this is _after_ the other machine had been rebooted for 15-20 > > minutes when this one locked up, hence my tendency to think it wasn't > > related to any traffic thru NFS at the time. I had just logged back > > in over ssh, done a cd to a subdir and an ls. The next operation and > > I forget now what it was, was over that ssh link, might have been an > > ls -l, completed ok, but then the keyboard and mouse were gone, I > > looked over at the gkrellm strip, it was frozen, I then reached and > > found the reset button. Had it been synchronous to the shop machines > > reboot, that would have been another critter entirely to this, IMO. > > > > Cheers, Gene > > That's what is normally called a stale file handle. The "soft" > attribute will help with that also. For whatever reason, when the > server side was rebooted, the client did not cleanly dismount, or never > dismounted the NFS mount. It's still trying to give you information > from the last mount, which doesn't exist anymore, and it keeps trying to > process the NFS commands. If you had done a manual "umount" then a > manual "mount" of the NFS partition before trying to access it with the > "ls" command it probably would have been okay. This is also where the > automount facility can come in real handy too. Automount automagically > umounts an NFS partition after a certain period of time of non-use. The > NFS partition will then be automounted the next time you access it. > Check out autofs. There are a lot of configuration settings that will > make NFS mounts virtually painless. > > Mark autofs is running on both boxes. No clue what the dismount timeout is but I would have thought it would have expired. I use it for copying stuff back and forth, but anything else is done over an ssh -Y link, which should not involve NFS. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Sometimes a man will tell his bartender things he'll never tell his doctor. -- Dr. Phillip Boyce, "The Menagerie" ("The Cage"), stardate unknown.
------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
