I have an NFS storage system and want to run jpegoptim on several GB's of jpeg images and I'm wondering what the best approach is. Is it ok to run this operation on the Server itself while the clients have it mounted or will this lead to problems like e.g. the dreaded "stale filehandle"?
Stale file handles won't happen if the file modified time stamp is updated. Add a simple 'touch $file' after updating each file.