EXT3 and large directories

Matt Dodson Matt_Dodson at messageone.com
Wed Oct 4 21:33:52 UTC 2006


I have an ext3 filesystem that has several directories and each
directory gets a large number of files inserted and then deleted over
time. The filesystem is basically used as a temp store before files are
processed. The issue is over time the directory scans get extremely slow
even if the directories are empty. I have noticed the directories can
range in size from 4k - 100M even when they are empty.  Is there a way
to fix this without recreating the directories or bringing the
filesystem offline? 


File system Info:


tune2fs 1.35 (28-Feb-2004)

Filesystem volume name:   <none>

Last mounted on:          <not available>

Filesystem UUID:          7cbda7aa-e8e7-4da1-9c7c-de45668e98f3

Filesystem magic number:  0xEF53

Filesystem revision #:    1 (dynamic)

Filesystem features:      has_journal resize_inode dir_index filetype
needs_recovery sparse_super large_file

Default mount options:    (none)

Filesystem state:         clean

Errors behavior:          Continue

Filesystem OS type:       Linux

Inode count:              98304000

Block count:              196608000

Reserved block count:     9830400

Free blocks:              31795332

Free inodes:              83024519

First block:              0

Block size:               4096

Fragment size:            4096

Reserved GDT blocks:      1024

Blocks per group:         32768

Fragments per group:      32768

Inodes per group:         16384

Inode blocks per group:   512

Filesystem created:       Thu Aug 10 11:10:59 2006

Last mount time:          Tue Oct  3 00:10:48 2006

Last write time:          Tue Oct  3 00:10:48 2006

Mount count:              4

Maximum mount count:      21

Last checked:             Thu Aug 10 11:10:59 2006

Check interval:           15552000 (6 months)

Next check after:         Tue Feb  6 10:10:59 2007

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:      59fd108a-7ec7-45f9-8967-b9f3aaec3edf

Journal backup:           inode blocks


Matt D.

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