We started to have problems in our testing around 15M entries in one directory (depends on hashing, add/remove cycles), but 10-12M entries is probably safe unless the filenames are long (e.g. above 32 chars). Cheers, Andreas > On Feb 12, 2015, at 12:35, Eric Sandeen <sandeen@xxxxxxxxxx> wrote: > >> On 2/12/15 1:16 PM, suntrop@xxxxxx wrote: >> Hello, i’m using a CMS which puts many files inside a single >> directory. I’m wondering what the maximum number of files is which >> can reside inside said directory. Is there a number which should not >> be exceeded on account of performance reasons e.g. Is there a >> difference between ext3 and ext4? >> >> Thanks! > > for htree directories, you will be limited by the max size of the tree, which currently is of limited depth. That limit then depends on block size and filename lengths. > > for 4k blocks, and 40 char names, you max out at around 20 million directory entries, if my old spreadsheet is still correct. > > That limit is the same for ext3 and ext4. > > performance-wise, to be honest, I'm not sure. how many inodes are you talking about? > > -Eric > > -- > 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 -- 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
