Subject: OT: Was: Re: How to capture all file system writes
To: Jason Thorpe <thorpej@wasabisystems.com>
From: Christoph Hellwig <hch@infradead.org>
List: tech-kern
Date: 10/22/2003 16:25:48
On Wed, Oct 22, 2003 at 08:22:52AM -0700, Jason Thorpe wrote:
> I don't think that Linux uses a pseudo-device shim layer for
> journaling.
Indeed. ext3's journaling is in a journaling block device (JBD)
layer, but despite the name it's not a pseudo-device layer but
more a library of journaling routines for physical block logging.
> They do, however, use physical block logging (IIRC).
ext3 and reiserfs do, jfs and xfs don't.