Posted Apr 14, 2009 20:46 UTC (Tue) by elanthis (subscriber, #6227)
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Stability and safety. Production environments are going to be more comfortable with a small incremental change to their existing FS than they are in switching and potentially being bitten by one of the many major changes in ext4.
Solving the ext3 latency problem
Posted Apr 16, 2009 19:35 UTC (Thu) by jordanb (subscriber, #45668)
[Link]
I think the idea is that ext3 is being made less reliable so that it will no longer be more reliable than ext4, to try to remove that argument against "upgrading."