> For I/O-heavy workloads with a lot of metadata changes - unpacking a tarball was given as an example - Dave said that ext4 could be 20-50 times faster than XFS.
A while ago, I read somewhere that XFS is good for a small number of large files, whereas ReiserFS is good for a large number of small files. I don't know whether that's true anymore if it ever was; but perhaps extracting a tarball with thousands of small files in it is not the best way to bring out XFS's strength?
By the way, when are we expecting the "experimental" label to be taken off of btrfs?