[IO-500] mdtest-hard issue

Hi, I would like to remind an issue regarding mdtest-hard benchmark. It creates files in a single directory for at least five minutes. When the metadata performance is more improved, the greater number of files will be created. This will hit the limit of the number of files in a single directory. Actually, the limit of Lustre file system is about 8M files although it depends the length of the pathname. When the metadata performance is better than 27K IOPS, it is not possible to execute the mdtest-hard create benchmark for five minutes since the number of files is larger than 8M. This is a reason we cannot submit the Lustre result. I expect this will be quite common when the metadata performance is more improved. Regards, Osamu --- Osamu Tatebe, Ph.D. Center for Computational Sciences, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 3058577 Japan