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Date:	Tue, 3 Oct 2000 16:12:31 +0100
From:	"Stephen C. Tweedie" <sct@redhat.com>
To:	linux-fsdevel@vger.kernel.org
Subject: Final ext3-0.0.4 test-only release

Hi,

OK, ext3 with metadata-only journaling is now running as reliably as I
can make it without making an incompatible change to the journal
format.  A usable release absolutely requires a jfs superblock format
change, so I'm releasing 0.0.4c purely as a WIP snapshot before the
superblock changes go in.

ext3-0.0.4c is now on *.kernel.org and on zen2.  Look for it in

	ftp.*.kernel.org:/pub/linux/kernel/people/sct/ext3/test-DONTUSE/
or	ftp.uk.linux.org:/pub/linux/sct/fs/jfs/test-DONTUSE/

This code should work fine under normal running, but IT CAN CORRUPT
DATA on a crash.  Anyone wanting to start testing it is welcome to.

Treat this ONLY as a demo snapshot for testing purposes!!!!!

I'm now starting the 0.0.5 branch, which will include the superblock
changes necessary to make recovery over crashes work with the
metadata-only journaling enabled.  Converting up will be possible
easily.  Converting back from 0.0.5 to a 0.0.3-compatible format will
require unmounting, remounting ext2 and recreating the journal.  0.0.5
will run 0.0.3 filesystems without converting, but only when using
full-journaling, and 0.0.5 will not create 0.0.3-compatible jfs
superblocks.

OK, you've had all the warnings, so if you do want to go ahead and
give 0.0.4c a test, thanks and let me know how it goes.

There has been no performance tuning at all done on this version, but
so far I'm getting speeds of between 75% (running 30-client dbench on
a 200MB box) and 100% (running straight sequential writes) of ext2
write performance on the new code.

Cheers,
 Stephen
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