Alan McKinnon schrieb:
[...]
Reiser tends to self-balance itself out. What is especially noteworthy is that
none of the general purpose Linux filesystems provide a defrag utility.
Theodore 'Tso and Hans Reiser are both exceptional programmers, if there was
a need for such a tool they would assuredly have written one. They did not,
so there probably isn't.
[...]
Well, as far as I know, ext4 will get an online defrag tool.
I once experienced performance losses on a reiserfs-volume used for
ccache (tailpacking enabled).
But otherwise you are right, fragmentation is usually caused by a bad
filesystem (FAT*), a filesystem that is mostly filled (when 99% is full,
the allocator has no choice but scatter any new writes over the whole
volume) or unusual usage patterns (write-delete-write-delete-... like my
ccache issue).
