Journaling UFS with gjournal.

[Ulrich Spoerlein]

Pawel Jakub Dawidek wrote:
> Hello.
> 
> For the last few months I have been working on gjournal project.

Cool Stuff!

> Reading. grep -r on two src/ directories in parallel:
> UFS:		84s
> UFS+SU:		138s
> gjournal(1):	102s
> gjournal(2):	89s
> 
> As you can see, even on one disk, untaring eight src.tgz is two times
> faster than UFS+SU. I've no idea why gjournal is faster in reading.

The UFS+SU score doesn't seem right. Why do SU have a negative impact on
read performance? Is it solely because of the atime updates?

Ulrich Spoerlein
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