To get reliability and faster fsck times, make sure the filesystem you are using supports journalling.

Older filesystems do a sequential scan through a directory and therefore are excruciating slow dealing with files in a large directory. Splitting the directory up helps, or using reiser or ext3+hdirs fixes this problem.

If you have a lot of I/O, you may consider turning off atime. This is not recommended for mailspools. This can be done in /etc/fstab with: /dev/partition /mountpoint reiserfs notail,noatime 0 3

reiser can be speed up at a small loss in diskspace by disabling tail compression (as shown in the example above).


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