On Wed, Feb 04, Andreas Dilger wrote: > How many files/subdirs in this directory? The old ext3 limit was 32000 > subdirs, which the dir_index fixed, but the new limit is 65000 subdirs > without "dir_index" enabled. See below: > > # for t in d f l ; do echo "type $t: `find /media/BACKUP_OLH_500G/ -xdev -type $t | wc -l`" ; done > > type d: 1051396 > > type f: 20824894 > > type l: 6876 > The 65000 subdir limit can be exceeded by turning on the "dir_nlink" > feature of the filesystem with "tune2fs -O dir_nlink", to allow an > "unlimited" number of subdirs (subject to other directory limits, about > 10-12M entries for 16-char filenames). I enabled this using another box, which turned the thing into an ext4 filesystem. Now ext4_dx_add_entry complains. > The other potential problem is if you create and delete a large number > of files from this directory, then the hash tables can become full and > the leaf blocks are imbalanced and some become full even when many others > are not (htree only has an average leaf fullness of 3/4 of each block). > This could probably happen if you have more than 5M files in a long-lived > directory in your backup fs. This can be fixed (for some time at least) > via "e2fsck -fD" on the unmounted filesystem to compact the directories. Ok, will try that. Thanks. Olaf -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
