I came across a blog reporting that Apple will not include ZFS in OS X which speculates that Oracle might kill ZFS because it has BtrFS. Another blog speculates that Apple didn't want to get in the middle of a lawsuit; NetApp claims ZFS infringes on their WAFL patent (the more I learn of NetApp the less I like them).
The news above makes me more interested in BtrFS. It's developed by Oracle but GPL'd and there are blogs and articles comparing BtrFS and ZFS. It looks like the next step for GNU/Linux systems which can't have ZFS but need something more advanced than ext4.
For now I welcome ext4 until BtrFS is ready. ext4 is the default file system for Fedora 11 (benefits list), which also has an icantbelieveitsnotbtr option for experimental BtrFS support. I wonder when either will make it to RHEL. ext4 will probably be in RHEL much sooner and I look forward to fast fsck'ing at work (where I have to fsck 1T every now and then).
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