Skip site navigation (1)Skip section navigation (2)
Date:      Mon, 19 Dec 2005 18:12:28 +0100 (CET)
From:      Oliver Fromme <olli@lurza.secnetix.de>
To:        freebsd-current@FreeBSD.ORG
Subject:   Re: "Native" journaling file systems?
Message-ID:  <200512191712.jBJHCS7A049137@lurza.secnetix.de>
In-Reply-To: <bbe90d1d0512190747u52e40480mee0a67674b6b0823@mail.gmail.com>

next in thread | previous in thread | raw e-mail | index | archive | help
Svein Halvor Halvorsen <svein.h@lvor.halvorsen.cc> wrote:
 > On 12/19/05, Justin Smith <jsmith@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
fsck.

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
breath.

Best regards
   Oliver

-- 
Oliver Fromme,  secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
Dienstleistungen mit Schwerpunkt FreeBSD: http://www.secnetix.de/bsd
Any opinions expressed in this message may be personal to the author
and may not necessarily reflect the opinions of secnetix in any way.

"I started using PostgreSQL around a month ago, and the feeling is
similar to the switch from Linux to FreeBSD in '96 -- 'wow!'."
        -- Oddbjorn Steffensen



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200512191712.jBJHCS7A049137>