[Linux-cluster] Re: Lazy umount - NFS HA

[Jonathan Biggar]

Matthew Geier wrote:
> Jordi Prats wrote:
>> Hi all,
>> It's normal that I must use a script to do a lazy umount (umount -l
>> /mountpoint) of a ext3 partition (not GFS) in a HA NFS cluster?
> 
>  I'm having the same problem - the service won't shutdown cleanly as it 
> can't unmount the file systems - which it can't unmount due to some one 
> logging in with SSH and their home directory is on that volume.

I don't think using umount -l is going to do what you want.  It means 
that the kernel will continue to write to the filesystem for an 
arbitrary amount of time after the umount completes, which *will* cause 
havok if another node mounts that ext3 partition.

We got around this by writing a custom script that uses fuser to 
identify and kill all processes that had open files on the filesystem.

-- 
Jon Biggar
Levanta
jon at levanta.com
650-403-7252