So If I use the following commands:
\\This shows the current and used maxfiles for the vol. It must be specified as just the name without /vol/ in front
> maxfiles <volname>
\\NetApp recommends adding 20% at a time as it can't be reduced. 20% would be good in my case and I have already expanded the volume by 50%
> maxfiles <volname> <max>
\\Checking inode usage on testvol
> maxfiles testvol
> Volume testvol: maximum number of files is currently 1899979 (1773835 used)
\\Increasing inode usage on testvol by 20%
> maxfiles testvol 2374973
I take it if the volume is deleted in the future the inodes would be freed up. I never like it when things cant be decreased. Makes you count those numbers very carefully.
Helpfull references
http://www.wafl.co.uk/maxfiles/
https://communities.netapp.com/docs/DOC-5027