Hello Nicolai
Thanks for your feedback.
Yes the /.SeCuRiTy.nnn files seem to be related to ACLs as mentioned in your article, and I guess they are stored by NetBackup when it can't set destination file's ACL. Below output from user_ops logs.
08:59:29 (4310795.001) Changed /SrcNFS/file1.tar.gz to /DstNFS/file1.tar.gz
08:59:29 (4310795.001) Unknown file type ''' for .SeCuRiTy.9, extracted as normal file
08:59:29 (4310795.001) ACLs of /DstNFS/file1.tar.gz restored to .SeCuRiTy.9
My restore completed successfully and with the right files' user/group id even if there were no more inodes for NetBackup to create the /.SeCuRiTy.nnn files.
So my probleme is just the fact that NetBackup eats all inodes of my root directory and leaving the system in a bad situation, so I have to manually cleanup these millions of files all time during restore operation.
I hope to find a good explanation of this strange behavior and a solution or workaround to fix it.