I'll say that I've been resizing production machines for a few years now 
without any issues.  This includes ext3 and reiserfs.  One of the 
partitions I am frequently resizing contains our Scalix mail store.  So 
far, I haven't had any issues with locking, db's, etc.

-Mike

der.hans wrote:
> moin moin,
>
> is it generally safe to resize, move, etc. an LVM partition without
> unmounting the partitions on top of it?
>
> How about resizing ext3 on the fly as well?
>
> reiserfs? Other Free FSen?
>
> It worked fine for me yesterday in a VM, but I wasn't really doing
> anything in the VM, except playing with the LVM setup.
>
> That situation doesn't really tell he what would happen on a real FS where
> people and processes have lock files and are reading and writing files or
> what a database thinks about having it's filesystem mucked with.
>
> ciao,
>
> der.hans
>   
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