Stephen, > > Why use more directories? That just means that you spend more time > updating more metadata for more directories. The point of htree is to > let the fs do this work itself, as efficiently as possible: if you try > with _1_ directory, you should see the best benefit from htree. ^^^ Well I the main reason I started spreading files over multiple directories is from the ext2 days when using a single directory it became unuseable when it contained more than a couple of hundred thousand files. I've always done this since and the test results do imply thats its more efficient - thats why I did the tests with htree as I was curious if this would solve the problem. > > > However, the performance still doesn't look that good, especially on the > 100 dirs case (10,000 files per dir) --- are you sure you set the > dir-index flag on the filesystem to enable htree operation? ^^^ Yes, I'm pretty sure, I did the following: tune2fs -O dir_index /dev/hda9 e2fsck -fD /dev/hda9 Then queried using dumpe2fs -h /dev/hda9 which gives: Filesystem volume name: <none> Last mounted on: <not available> Filesystem UUID: 07691ca4-a168-11d7-8257-00c0df01c990 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal dir_index filetype needs_recovery sparse_super Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 17251872 Block count: 17241753 Reserved block count: 862087 Free blocks: 16693285 Free inodes: 17251852 First block: 0 Block size: 4096 Fragment size: 4096 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 32736 Inode blocks per group: 1023 Last mount time: Wed Jun 18 16:43:47 2003 Last write time: Wed Jun 18 16:43:47 2003 Mount count: 3 Maximum mount count: 20 Last checked: Wed Jun 18 11:14:51 2003 Check interval: 15552000 (6 months) Next check after: Mon Dec 15 10:14:51 2003 Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 128 Journal inode: 8 Default directory hash: tea Directory Hash Seed: 7d45fbeb-7e2d-47b2-8ecc-24874e8dc686 If there is anything that I've missed I'd like to know - I'm interested in getting the best performance possible. I can run any additional tests. Thanks, Glen _______________________________________________ Ext3-users@redhat.com https://www.redhat.com/mailman/listinfo/ext3-users
