Re: Device or resource busy

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On Mon, 2008-10-27 at 15:29 +0100, Stephan Windmüller wrote:
> On Mon, 27. Oct 2008, Trond Myklebust wrote:
> 
> > > When I look with "nfsstat -m", I can see a lot of mount points for each
> > > user, including the directory which cannot be deleted. One user had a
> > > total of 200 mounts!
> > If /export/username is on a different volume from /export on the server,
> > then the NFS client has to mount it as being a different volume on the
> > client. 'cat /proc/fs/nfsfs/volumes' should be able to tell you if your
> > server is exporting more than one volume.
> 
> /export and /export/home/username are different volumes, but I only
> share /export/home/username. Also it is not only the homedirectory
> itself but many subdirectories which cause this error. A sample output
> from 'nfsstat -m':
> 
> -----
> 
> /home/username from fileserver:/export/home/username
>  Flags: rw,vers=3,rsize=1048576,wsize=1048576,hard,intr,proto=tcp,timeo=600,retrans=2,sec=sys,addr=fileserver
> 
> /home/username/workspace/ls5/da/text/Konzept from
> fileserver:/export/home/username/workspace/ls5/da/text/Konzept
>  Flags: rw,vers=3,rsize=1048576,wsize=1048576,hard,intr,proto=tcp,timeo=600,retrans=2,sec=sys,addr=fileserver
> 
> /home/username/.eclipse/org.eclipse.platform_3.3.0_1148896627 from
> fileserver:/export/home/username/.eclipse/org.eclipse.platform_3.3.0_1148896627
>  Flags: rw,vers=3,rsize=1048576,wsize=1048576,hard,intr,proto=tcp,timeo=600,retrans=2,sec=sys,addr=fileserver
> 
> [...]
> 
> -----
> 
> The output from /proc/fs/nfsfs/volumes looks like:
> 
> NV SERVER   PORT DEV     FSID
> v3 81d91add  801 0:29    1000001009f:0
> v3 81d91add  801 0:27    1000001010f:0
> v3 81d91ade  801 0:30    100000100f1:0
> v3 81d91add  801 0:31    1000001018b:0
> v3 81d91add  801 0:26    10000010189:0
> v3 81d91ade  801 0:28    100000100ef:0
> v3 81d91ade  801 0:32    100000100f6:0
> v3 81d91add  801 0:33    10000010192:0

Which shows you have at least 5 different volumes mounted from server
129.217.26.221, and 3 different volumes mounted from server
129.217.26.222.
As I said earlier, every time you cross from one volume to another (even
if it is on the same server), a mountpoint is automatically created.
Otherwise, you would have issues with two different files possibly
sharing the same inode number on the same NFS filesystem.

Cheers
  Trond

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