Linked by Joel Dahl on Sun 25th Apr 2010 19:25 UTC
FreeBSD Today Jeff Roberson committed his patches to FreeBSD 9 for adding journaling to UFS. No more background fsck after unclean shutdowns! This is a major landmark in the history of UFS, with 11000 new lines of code (and about 2000 removed). Much of the work was done in collaboration with Kirk McKusick, the original author of FFS and Softupdates, under sponsorship form Yahoo!, Juniper and iXsystems. Jeff's blog contains quite a lot of technical information of his work. There's also information on the FreeBSD mailing lists.
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Furthermore Hammer as it is in DragonFly relies on a ton of changes made over years to the VFS layer alone and likely changes to many other kernel subsystems that have not occurred in FreeBSD as they were not needed by it and would thus need to be ported before any serious attempt to get Hammer working could get underway.

That is a good reason! ;)
I didnt think of that, this early in the morning here in sweden. I was just thinking BSD = BSD.

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