You can dynamically rename.. even with NAS as long as auto export update is on for nfs... cifs automatically changes shares to the new path. For LUNs you can rename all including the volume, qtree, lun and igroup... see example below in my vsim. I create a volume/qtree/lun/igroup called "test" then rename each to "test2". I would be careful with snapdrive interaction and snapmanager too but the renames are done with now outage.
fas6280> vol create test aggr1 2g
Creation of volume 'test' with size 2g on containing aggregate
'aggr1' has completed.
fas6280> qtree create /vol/test/test
fas6280> lun create -s 32m -t windows /vol/test/test/test.lun
lun create: created a LUN of size: 39.2m (41126400)
fas6280> igroup create -i -t windows test iqn.1991-05.com.microsoft:win-oqjy6cd3mns
fas6280> lun map /vol/test/test/test.lun test
fas6280> Fri Dec 16 21:30:44 GMT [fas6280:lun.map:info]: LUN /vol/test/test/test.lun was mapped to initiator group test=0
RENAMES
fas6280> vol rename test test2
Fri Dec 16 21:32:38 GMT [fas6280:wafl.vvol.renamed:info]: Volume 'test' renamed to 'test2'.
'test' renamed to 'test2'
fas6280> priv set advanced
Warning: These advanced commands are potentially dangerous; use
them only when directed to do so by NetApp
personnel.
fas6280*> qtree rename /vol/test2/test /vol/test2/test2
fas6280*> lun move /vol/test2/test2/test.lun /vol/test2/test2/test2.lun
fas6280*> igroup rename test test2
fas6280*> lun show -m
LUN path Mapped to LUN ID Protocol
-----------------------------------------------------------------------
/vol/test2/test2/test2.lun test2 0 iSCSI
