- Posted In
- Red Hat Enterprise Linux
I currently have a RHEL 5.4 server running as an NFS server. It exports 3 filesystems with the default option in /etc/fstab like this:
/dev/vg-LU99/LU99 /lu99 ext3 defaults 0 0
/dev/vg-U99/U99 /u99 ext3 defaults 0 0
/dev/vg-SYSADMIN/SYSADMIN /sysadmin ext3 defaults 0 0
I need to enable ACL's by changing "defaults" to "acl" and then remount.
I need to refresh these mounts on both the nfs server and about 50 clients without a reboot. If I understand correctly, I can run:
> mount -o remount /<mountpoint>
And this will allow the ACL support to the client. But I must also remount the filesystem on the client. I believe I can use the same command on the client for this.
However, these are production systems and downtime/reboots are not possible. I'm concerned about how filehandles and read/write operations are affected during and after the remount. In particular, are they disrupted, cached. I'm hoping I can simply issue the command above without losing any read/write's. Can anyone help provide a little explaination or point me to the appropriate documentation?