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Operating Systems Linux Red Hat Difference between sync & async in nfs Post 302356197 by Amol21 on Friday 25th of September 2009 12:28:30 AM
Old 09-25-2009
Difference between sync & async in nfs

Hi All....

This is related to exporting a file system through nfs. Just wanted to understand the significance of sync/async in nfs.

We give this entry in /etc/export file. What is the difference between these two.

Any hep is appreciated.

Regards,
Amol.
 

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UMOUNT.NFS(8)						      System Manager's Manual						     UMOUNT.NFS(8)

NAME
umount.nfs, umount.nfs4 - unmount a Network File System SYNOPSIS
umount.nfs dir [-fvnrlh ] DESCRIPTION
umount.nfs and umount.nfs4 are a part of nfs(5) utilities package, which provides NFS client functionality. umount.nfs4 and umount.nfs are meant to be used by the umount(8) command for unmounting NFS shares. This subcommand, however, can also be used as a standalone command with limited functionality. dir is the directory on which the file system is mounted. OPTIONS
-f Force unmount the file system in case of unreachable NFS system. -v Be verbose. -n Do not update /etc/mtab. By default, an entry is created in /etc/mtab for every mounted file system. Use this option to skip delet- ing an entry. -r In case unmounting fails, try to mount read-only. -l Lazy unmount. Detach the file system from the file system hierarchy now, and cleanup all references to the file system as soon as it is not busy anymore. -h Print help message. NOTE
For further information please refer nfs(5) and umount(8) manual pages. FILES
/etc/fstab file system table /etc/mtab table of mounted file systems SEE ALSO
nfs(5), umount(8), AUTHOR
Amit Gud <agud@redhat.com> 6 Jun 2006 UMOUNT.NFS(8)
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