Is there a way to shrink a directory entry?
My dovecot maildir directories have increased in size from the default 4096 to several megs, and it is messing with disk quotas.
The only way that I have found, is to delete and recreate the directory. I am hoping there is a magical function somewhere - I am open to anything, except for hand-coded assembler.
Edit:
For posterity, to find dirents>4096:
find / -type d -size +4k -printf "%s\t%p\t%i\n" | sort -nr
Answer
See also rm on a directory with millions of files; tangentially related, but we discuss it there.
As far as I'm aware, at least on ext2/3, no, there's no (online) way to shrink them short of delete + recreate. Unmounted, several sources suggest e2fsck -D might work, though I can claim no personal experience with that option.
Some references for further reading:
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