Linked by Rahul on Sat 18th Oct 2008 11:29 UTC
While Ext4 was originally merged in 2.6.19, it was marked as a development filesystem. It has been a long time coming but as planned, Ext4dev has been renamed to Ext4 in 2.6.28 to indicate its level of maturity and paving the way for production level deployments. Ext4 filesystem developer Ted Tso also endorsed Btrfs as a multi-vendor, next generation filesystem and along with the interest from Andrew Morton, Btrfs is planned to be merged before 2.6.29 is released. It will follow a similar development process to Ext4 and be initially marked as development only.
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2005-07-07
Doesn't ext3 already have an online defragmenter? I recall that the major drawback of it that it needs a significant amount of freespace to be effective.
From wikipedia:
http://en.wikipedia.org/wiki/Ext4
"Ext4 will eventually also have an online defragmenter. Even with the various techniques used to avoid it, a long lived file system does tend to become fragmented over time. Ext4 will have a tool which can defragment individual files or entire file systems."