Online resizing of ext3 filesystems {shrink}

[Andy Burns]

Chris Adams wrote:

> Without shrink, expand is not all that useful.  With LVM, shrink and
> expand can be used to re-allocate free space to different filesystems.
> Without shrink, that can't be done.

Yes it can, initially leave plenty of unused space within your VGs, only 
allocate and grow each LV as it actually demands it, so you never have 
to steal from one LV to give space to another.

If you grow by appending an additional LE to the LV you end up 
fragmented within the LV, if possible add a new LE of the whole desired 
size of the LV, then remove the existing LE.

I don't know many real world servers where users end up using *less* 
space, it's always *more* space, so growing is always more important 
than shrinking ...