NFS Client Receives Error Editing File in VI - Warning the File has Changed Since Reading It

NFS Client receives error editing file in vi "warning the file
has changed since reading it"
Solution ID: 29
Created: 7/8/2008
DETAILS:
Issue:
NFS clients think that files on the IBRIX file system are changing while they are
open. i.e. if you open a text file with vim on an NFS-mounted IBRIX file system
and try to save it 15 seconds later, it reports this error:
WARNING: The file has been changed since reading it
Note: This happens with Emacs as well so it is not just a vim issue. Upon
collection of ibrix_fs -i output the issue was identified to be specific to the mount
option "asynchronous" which is incompatible with our file system. By default we
mount sync mode. Here is the relevant portion of ibrix_fs -i -f "/ibrixfs
"*(rw,async,fsid=1)"
The async option is not compatible with ibrix_fs which ensures consistency
across the fs and acknowledgements back for changes etc... It is synchronous by
default as you must have with any clustered fs.
Resolution:
To fix this, from your Fusion Manager you have to first, unexport your ibrix file
system and then export it again specifying the correct "-o" mount options.
The proper command syntax to perform this is to fill in the applicable export
server name after the -h and FS_NAME: ibrix_exportfs -f ibrixfs -U -h
HOSTNAME -p *:/ibrix_fs ibrix_exportfs -f ibrixfs -h HOSTNAME -p *:/ibrix_fs -o
"rw,no_root_squash"
IBRIX_S00000029.pdf
Last modified: 7/8/2008