From: Hans Reiser <reiser@namesys.com>
To: Mirar <mirar-yg@mirar.org>
Cc: "Dieter Nützel" <Dieter.Nuetzel@hamburg.de>, reiserfs-list@namesys.com
Subject: Re: power loss -> corruption
Date: Thu, 08 May 2003 22:58:35 +0400 [thread overview]
Message-ID: <3EBAA8DB.3080202@namesys.com> (raw)
In-Reply-To: <m17k911sq4.fsf@orchid.mirar.org>
You have run into the disadvantage of meta-data journaling, which is
that files that you are writing to may be corrupted if you crash. This
disadvantage exists for performance reasons: using traditional
journaling approaches such as V3 uses, if you journal the data you must
write it twice. V3 also offers you the option of performing ordered
writes, in which, if I remember right, metadata is only updated after
the data reaches disk.
V4 uses a completely different technology we call wandering logs, in
which every filesystem operation is performed as a fully atomic
transaction, and because of its new design, there is very little
performance cost (in fact, reiser4 is higher performance than V3). We
hope V4 will be ready for prime time sometime this summer.
--
Hans
next prev parent reply other threads:[~2003-05-08 18:58 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-11 5:15 How to work around bad blocks? Dirk Leber
2003-03-10 20:50 ` Anders Widman
2003-05-08 11:18 ` power loss -> corruption Mirar
2003-05-08 11:48 ` Dieter Nützel
2003-05-08 12:06 ` Mirar
2003-05-08 13:02 ` Dieter Nützel
2003-05-08 13:19 ` Mirar
2003-05-08 13:31 ` Dieter Nützel
2003-05-15 8:40 ` Mirar
2003-05-15 11:23 ` Dieter Nützel
2003-05-15 15:17 ` Mirar
2003-05-08 18:58 ` Hans Reiser [this message]
2003-05-08 19:20 ` Mirar
2003-05-08 19:28 ` Hans Reiser
2003-05-08 19:31 ` Hans Reiser
2003-05-08 19:39 ` Mirar
2003-05-08 12:02 ` Bill Rees
-- strict thread matches above, loose matches on Subject: below --
2003-05-08 12:23 berthiaume_wayne
2003-05-08 12:32 ` Mirar
2003-05-08 12:38 ` Marc-Christian Petersen
2003-05-08 12:34 ` Anders Widman
2003-05-08 12:39 ` Marc-Christian Petersen
2003-05-08 13:01 ` Dieter Nützel
2003-05-08 13:24 ` Chris Mason
2003-05-08 13:36 ` Dieter Nützel
2003-05-08 13:40 ` Chris Mason
2003-05-08 12:39 ` Dieter Nützel
2003-05-08 19:37 Fong Vang
2003-05-08 19:52 ` Hans Reiser
2003-05-15 22:38 Anders Widman
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