[H-GEN] ext2 or ext3

[Robert Brockway]

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On 20 Jun 2002, Clinton Roy wrote:

> I can remember from lca (you *do* remember lca, right Jason? ;) that
> ext3 supports user data journalling out of the box, a quick google
> session showed that there's a patch out there for making reiserfs

The reiserfs team want to get it into 2.4 but they're not sure they'll be
able to. Otherwise it'll just remain an unofficial patch.  It'll be in 2.5
shortly.

> journal user data. I couldn't (quickly and easily) find any such patch
> for XFS, but I highly suspect it's possible given it's maturity.

I patched my kernel for the new XFS 1.1 the other day I could have sworn 
it was in there.
 
> Obviously, journalling user data would have increased overheads over
> meta-data only journalling, but I agree with Jason, one is pretty
> pointless without the other.

The argument goes that the loss of metadata is far more catastrophic on 
average than the loss of non-meta data.  That is why Linux's disk sync 
used to sync data every 30 seconds but metadata every 5 seconds.  It's 
more complex than that now (last time I looked :)

Cheers,
	-Rob

-- Robert Brockway B.Sc. email: robert at timetraveller.org  ICQ: 104781119
   Linux counter project ID #16440 (http://counter.li.org)
   avon: up 12 days,  8:45,  2 users,  load average: 0.02, 0.02, 0.00
   "The earth is but one country and mankind its citizens" -Baha'u'llah


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