On 2011-05-13, at 5:36 AM, Mateusz Korniak <mateusz-lists@xxxxxxxxxxxxxx> wrote: > I am hitting strange number of files inside directory limitation. > I am able to create only around 120k files. > Number varies [1] as seems I am able to add files with some filenames but with > other creation fails [2]. > > Files have structure <small_ind><sha/md5sum> [3]. > All on linux box [4],[5], having plenty of frees space [6]. > Filesystem fscked - everything ok. > > > [3]: > 494_0cf1500e1ecbeecb3282b1e68b2df53b77d06665 > 494_40654eec2dd15e4065e49faa2ea226dd25191457 > > [5]: > tune2fs -l /dev/md7 > tune2fs 1.41.11 (14-Mar-2010) > > Block count: 117190656 > > Block size: 1024 Limit is because you must have formatted the filesystem with 1023-byte blocksize. There is a 2-level limit on htree directories, and with the long filenames you are using you only get about 16 entries in each leaf block. With 1024-byte blocks there can be at most (1024-16)/8*(1024-8)/8*3/4= 192k entries with perfect hashing. In order to exceed this limit you unfortunately need to format your fs with a larger blocksize (or fix htree to allow more than depth 2). Andreas -- 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
