Subject: Re: what's it take to get a journaling filesystem?
To: Sean Davis <>
From: Steven M. Bellovin <>
List: tech-kern
Date: 12/12/2005 22:50:58
In message <>, Sean Davis writes:
>Okay, time for me to ante up. I've been trying to help provide debug info on
>a bug causing deadlock for several days now, and have become quite
>frustrated with the time it takes to fsck 477GB of FFS.
>Are there any plans to write a journaling filesystem for NetBSD? Wasabi has
>one, but they aren't sharing it, so that's out of the question.
>Basically, it boils down to: what do I have to do to get a filesystem that
>can recover from a crash when >= half a terabyte is involved, without having
>to wait 15-30 minutes for fsck? I am willing to pay for such a filesystem to
>be developed, but only if it's made available to all NetBSD users, as I'm
>sure I can't be the only one bothered by the time it takes to fsck a large
>amount of disk space when a machine crashes.
>Is anyone working on such a thing? FFS is great, and suits my purposes
>perfectly, except when I have to recover from a crash. When I started using
>NetBSD, I had perhaps 4GB of disk space to deal with, so it was a non-issue
>then, but now, it's getting quite annoying.
>Buying a filesystem from Wasabi is a joke unless it's provided in the form
>of constantly-updated patches to -current. Linux has been providing decent
>enough journaling filesystems for years now, why is NetBSD so far behind in
>that arena?

I'd sure like to see one, too -- I have a few research projects planned 
that may have to be done on Linux, simply because a journaling file 
system is a necessary base.

		--Steven M. Bellovin,