[HPDD-discuss] False: No Space Left on device or inode limitation reached?

Dear All, Lustre: v1.8.5 One of our user is running into this error: "IOError: [Errno 28] No space left on device: " Although this is a python error, user is running into this multiple times while running on Lustre file system, during the life of his job. Hence I am trying to figure out if there is a way to tell if we hit Lustre/etx3 number of files limitation in a directory. Although I do not think this is the case because I read that the ext3 limitation is 15million files in a directory. I have also checked ulimit for the user and do not find any issues there. Also we are only 60% used on disk space for Lustre file system so we have not hit capacity issue. Currently user generates about over 3.5 million files during his job run. After the failure we tested creating files manually and by script in the same directory and it works without error. Any insight into this will be greatly appreciated. Regards, Amit H. Kumar