Zev Thompson wrote:
Apparently one of the Google Summer of Code projects is to add
journaling to UFS. When it already has softupdates, why? I've seen
benchmarks that seem to indicate that softupdates performs as well or
better in most cases, though I have nothing on hand to substantiate
that. I thought the only real disadvantages of softupdates were:
- harder to code and implement (though this is already done, so should
not be an issue)
- sometimes deleting files does not free space right away
Possibility of data loss, I'm guessing, is the same with either.
Filesystem corruption is similarly very unlikely.
So why the change? Thanks in advance for any answers.
Large filesystems without journaling take too long to fsck.
There's plenty of messages about this out there, otherwise I wouldn't
have know the answer :-)
--Alex
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