[dm-devel] generic wrappers for multi-device FS operations

[Ric Wheeler]

On 03/09/2011 09:23 AM, Alasdair G Kergon wrote:
> On Tue, Mar 08, 2011 at 10:05:40AM -0800, Wendy Cheng wrote:
>> So the "resize" is on the filesystem, not the volume ? The "grow" part
>> is probably easy. Unfortunately, the "shrink" may not be easy for some
>> of the filesystems:
> The LVM situation today works both ways around.
>
> You can use 'lvresize' with an option to resize the filesystem too,
> or use 'fsadm' with an option to resize the LV.  We felt that 'fsadm'
> was a more-natural approach: allow the user to resize their filesystem
> and automatically adjust the things underneath as necessary.
>
> Long term, we'd like it to be possible to configure a system for resizing
> entire device stacks both top down (fsadm) and bottom up (triggered by the
> appropriate Unit Attention).
>
> (The current fsadm script was written as a proof-of-concept under the
> constraint of just wrapping existing binaries. Of course there are cleaner
> ways to do it when you allow filesystem-specific code.)
>
> Alasdair

Is anyone actively looking at taken it beyond proof of concept?

Ric