http://www.phoronix.com/scan.php?page=article&item=ext4_benchmarks&num=1
"With the EXT4 file-system being marked as stable in the forthcoming Linux
2.6.28 kernel, and some Linux distributions potentially switching to it as an
interim step until the btrfs file-system is ready, we decided it was time to
benchmark this journaled file-system for ourselves."
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