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тАО12-07-2009 08:34 PM
тАО12-07-2009 08:34 PM
NFS stale
Will auto mounter client gets stale NFS?
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тАО12-07-2009 09:16 PM
тАО12-07-2009 09:16 PM
Re: NFS stale
I think if you are already in the directory, yes, you may get.
I didnt check.
Regards,
Sooraj
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тАО12-07-2009 10:06 PM
тАО12-07-2009 10:06 PM
Re: NFS stale
Thx
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тАО12-07-2009 10:13 PM
тАО12-07-2009 10:13 PM
Re: NFS stale
Hi,
Most propabaly you may get it ..
Aneesh
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тАО12-08-2009 04:05 PM
тАО12-08-2009 04:05 PM
Re: NFS stale
If an NFS client has a filesystem mounted from a server and the server is rebooted, any access to that filesystem on the client will hang until the server begins responding to requests again. The client should not report a stale filehandle unless the server removes the shared directory, stops sharing the directory, or somehow modifies the filehandle used to represent the directory.
In a normal case, the server will reboot and the client will automatically recover with no user intervention.
Regards,
Dave
[Any personal opinions expressed are mine, and not official statements on behalf of Hewlett Packard Enterprise]
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тАО12-09-2009 07:46 AM
тАО12-09-2009 07:46 AM
Re: NFS stale
Unix operates with beer.
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тАО12-09-2009 08:48 AM
тАО12-09-2009 08:48 AM
Re: NFS stale
If your HP-UX box is running 11i v2 or higher we support the forcible unmount option that should allow you to remove any hung/stale NFS filesystems without rebooting the client.
Regards,
Dave
[Any personal opinions expressed are mine, and not official statements on behalf of Hewlett Packard Enterprise]
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тАО12-09-2009 12:08 PM
тАО12-09-2009 12:08 PM
Re: NFS stale
Dave: no, unfortunately we only have 11iv1 boxes. But I thought force-umount wasn't implemented until v3. At least it was stated so in the following white paper:
http://www.docs.hp.com/en/3929/ForciblyUnmountingNFSFilesystems.pdf
As for the NetAPP problem: a user had a cronjob running every minute in his home that was on a remote NFS share. So the mount was really busy, and after I umounted it a few seconds later it came back.
Unix operates with beer.
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тАО12-09-2009 12:18 PM - last edited on тАО06-18-2021 04:07 AM by Ramya_Heera
тАО12-09-2009 12:18 PM - last edited on тАО06-18-2021 04:07 AM by Ramya_Heera
Re: NFS stale
Hi Viktor,
I guess that techncial paper is out of date. I blame the paper's author for being lazy.
Looking at the umount_nfs(1M) man page on 11i v2 systems you'll see:
-f Forcibly unmount a file system. Without this
option, umount does not allow a file system to be
unmounted if a file on the file system is busy.
Using this option can cause data loss for open
files; programs which access files after the file
system has been unmounted will get an error (
[EIO]).
At one time the techncial paper was correct, as 11i v2 didn't support forced unmount at initial release. However, we added this feature in PHKL_31500 Sept04 base patch:
( SR:8606352682 CR:JAGaf13487 )
( SR:8606353585 CR:JAGaf14379 )
Enhancement: This product update enables the forced unmount
of NFS file systems. When an NFS client loses contact with
a server, it is unable to recover without waiting for the
server to recover, at which point the client has a large
number of stale file handles. There is no option for
failing over to a working NFS server, since the client is
unable to unmount the NFS file system. The ability to do a
forced unmount is necessary.
Sorry for the confusion.
Dave
[Any personal opinions expressed are mine, and not official statements on behalf of Hewlett Packard Enterprise]