On Fri, Jun 09, 2017 at 03:00:56PM -0600, Andreas Dilger wrote: > > I didn't include large_dir because it isn't included in the upstream > kernels yet, and we haven't been using this in production due to lack > of e2fsck support (which Seagate has finally implemented, thank you). Also, does Lustre use large_dir on the MDS server, or on the Lustre data server? Because I noticed that on the MDS server you're apparently not using extents: export EXT_MKFS_OPTIONS="-I 2048 -O ^64bit,mmp,uninit_bg,^extents,dir_nlink,... ^^^^^^^^ Are you really using large_dir on a file system that is using indirect block mapped files? - Ted