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Fedora 16 To Use Btrfs Filesystem By Default
dkd903 writes "According to proposals for Fedora 16, Btrfs will be the default filesystem used in that release. The proposal has been approved by the Fedora Engineering Steering Committee. In Fedora 16, the switch from EXT4 to Btrfs will be a 'simple switch' — it means that major Btrfs features such as RAID and LVM capabilities will not be forced onto users."
Snapshot takes minimal disk space compared to a backup. Plus you would need to backup the entire / tree to rollback changes made by a yum update.
Is there a need an fsck? For example, ZFS doesn't have one and I haven't heard of anybody working on it (or of anybody actually wanting one).
Um, yeah, read zfs-discuss. There are helpful folks on there who help people recover their ZFS volumes, but having a tool to do it would be much better.
fsck for ZFS or btrfs means something different than it does for ext* but it's still needed. I just had a client's new 18TB ZFS zvol go TU when the power failed and the UPS->host communication wasn't properly connected. Fortunately it wasn't very important and the important zvol wasn't active when the power failed.
btrfs will be better than ZFS for many use cases once the fsck is stable. For others ZFS will remain better, but you better have battery-backed disk cache or a monitored UPS (neither of which are appropriate requirements for large swaths of the Fedora user base).
My God, it's Full of Source!
OUTSIDE_IP=$(dig +short my.ip @outsideip.net)
Use an incremental backup?
That would still mean a shitload of data to copy around. The point of copy-on-write snapshots is that the cost of copying your whole file system is essentially zero.
To make an normal application analogy: Of course you don't really need Undo/Redo, you can just "Save As" your file at any step of the way, but Undo/Redo makes things a hell of a lot more convenient and more importantly it helps you in those situation where you would have considered a "Save As" to be to much work to bother with and thus have no backup to fall back to.