Hi everyone, I'm playing around with btrfs (this time on a Fedora 20 VM). I used the default configuration for btrfs that Anaconda provides. Right after installation I did: #btrfs subvolume list / ID 257 gen 102 top level 5 path root ID 258 gen 102 top level 5 path home I then installed the yum-plugin-fs-snapshot package to try it out. I installed some updates and after it: #btrfs subvolume list / ID 257 gen 102 top level 5 path root ID 258 gen 102 top level 5 path home ID 278 gen 95 top level 257 path yum_20140130172422 ID 279 gen 97 top level 5 path home/yum_20140130172422 Fine. yum created the snapshots. I then wanted to rollback my system (to the state prior to the updates) so I went ahead and changed the rootflags=subvol... parameter in GRUB's kernel line in order to specify the above snapshot for the root filesytem. (I also changed /etc/fstab to point /home to the snapshot subvolume). After booting, everything seemed right (I was running off the snapshot subvolumes). Now, here's the thing. I wanted to permanently run off these snapshots so I wanted to delete the parent "subvolumes" for these snapshots (e.g. "commit" the snapshot) by doing: # mount -o subvolid=5 /dev/vda3 /mnt # btrfs subvolume delete /mnt/root Delete subvolume '/mnt/root' ERROR: cannot delete '/mnt/root' - Device or resource busy I believe this is happening because the snapshots are being created WITHIN the subvolume they're snapshotting against. That is, I can't delete it because the currently running root snapshot, yum_20140130172422, resides inside the "root" subvolume. Is this theory correct? Can you modify the yum plugin so that it places its snapshots within OTHER particular subvolume? BTW, is there anyone out there using this plugin with btrfs? Thanks! Jorge p.d. I know snapshotting /home doesn't make sense at all for yum updates but I followed it along... -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
