Linked by Thom Holwerda on Tue 31st Mar 2009 15:47 UTC, submitted by Rahul
Fedora Core The Fedora team has announced the Fedora 11 beta release. It comes packed with new features, such as Ext4 as the default filesystem, Nouveau driver by default, kernel mode setting on Intel, ATI and Nvidia drivers, many virtualization improvements, IBus input method, GCC 4.4, and much more.
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RE[5]: Ext4 as default
by Rahul on Tue 31st Mar 2009 19:35 UTC in reply to "RE[4]: Ext4 as default"
Rahul
Member since:
2005-07-06

"Moreover this (data loss) was a problem with xfs, which was fixed two years ago (patched in 2007). So with all due respect for ext4 developers (including the one who came from xfs), it seems that they may somehow skip other obvious (and well described) reasons for fs malfunctioning."

Err, all the patches going into 2.6.30 are based on the same hacks that went into XFS.

http://lwn.net/Articles/323752/

Reply Parent Score: 1

RE[6]: Ext4 as default
by sbergman27 on Tue 31st Mar 2009 19:49 in reply to "RE[5]: Ext4 as default"
sbergman27 Member since:
2005-07-24

It looks to me like Ted is too focused on benchmark numbers to realize the inevitability of allocate-on-commit as an ext4 feature, and furthermore, as a default. Anyone who cares about Linux's reputation for stability must accept that writing metadata ahead of data is simply insane. And if that hurts us in some benchmarks, then so be it. People who don't case about their data can always revert to the unstable behavior which is the default, even with the 2.6.30 patches.

Reply Parent Score: 6

RE[7]: Ext4 as default
by segedunum on Wed 1st Apr 2009 13:47 in reply to "RE[6]: Ext4 as default"
segedunum Member since:
2005-07-06

Anyone who cares about Linux's reputation for stability must accept that writing metadata ahead of data is simply insane. And if that hurts us in some benchmarks, then so be it.

Yer, it's a big problem. What good is metadata if the actual data it is referencing isn't there? All you've got is a broken filesystem when you bring things back up. I can't believe that.

It's strange that we've had all this 'data loss' stuff levelled at XFS over the years as an advantage of ext3 when they're making even more mistakes with ext4 and replicating problems and scenarios XFS has fixed.

Reply Parent Score: 3

RE[6]: Ext4 as default
by broch on Tue 31st Mar 2009 19:53 in reply to "RE[5]: Ext4 as default"
broch Member since:
2006-05-04

err, these patches were introduced two years ago.
so this was known, problem and fixed long time ago in xfs. Still it needed this whole hoopla now before known issue was fixed (but not tested in ext4)

Reply Parent Score: 1

RE[7]: Ext4 as default
by Rahul on Tue 31st Mar 2009 20:02 in reply to "RE[6]: Ext4 as default"
Rahul Member since:
2005-07-06

Actually, wrong again. Ted did know about this problem and commented about it in the FOSDEM 2009 video and said that he was pushing in patches that followed the XFS ideas long before this problem was well known.

http://lxer.com/module/newswire/view/116126/#ext4

The actual video that has more details is available online and was pointed out by a previous poster

Reply Parent Score: 1