It does, but not as much as you'd think given the noise.
The two main problems with inode write performance:
- They're done in no good order. Hence extra seeks.
- They're done at the same time as your carefully optimised read
order. Hence they screw it up.
- The dirty inodes take up memory which could be used for other inodes..
> [Hey, _what_ write perfrmance? What access times are modified?
> Directories access times? That's STRANGE.]
Directory access times are updated because you're reading the
directories. That's normal and POSIX. Mount with `nodiratime' if you
don't like it.
-- Jamie
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