"Native" journaling file systems?

Oliver Fromme olli at lurza.secnetix.de
Mon Dec 19 09:12:31 PST 2005

Svein Halvor Halvorsen <svein.h at lvor.halvorsen.cc> wrote:
 > On 12/19/05, Justin Smith <jsmith at drexel.edu> wrote:
 > > Are there any plans to develop UFS3--- i.e., a UFS2 file system with an
 > > added journal?
 > Take a look at the gjournal system developed by Ivan Voras as a Google
 > Summer of Code project. I don't know how stable that is, but it's
 > probably worth a look.
 > http://ivoras.sharanet.org/freebsd/gjournal.html

It has one problem:  After a crash, you cannot simply
replay the journal in order to get the file system into
a consistent state.  You still have to run a full-blown

That problem renders gjournal rather useless.

 > Also; Read-only XFS support was commited to 7.0 last week. Write
 > support is probably comming when the developer has time to write it.

I would very much hope so (even though it is GPL so it
can never replace UFS in FreeBSD).  But write support is
probably ten times more complex than read-only support,
so that's a huge amount of work.  I wouldn't hold my

Best regards

Oliver Fromme,  secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
Dienstleistungen mit Schwerpunkt FreeBSD: http://www.secnetix.de/bsd
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