On 2013-11-27 10:15, Konstantinos Skarlatos wrote: > On 26/11/2013 7:44 μμ, Goffredo Baroncelli wrote: >> On 2013-11-26 16:12, Konstantinos Skarlatos wrote: >>> On 25/11/2013 11:23 μμ, Goffredo Baroncelli wrote: >>>> Hi all, >>>> >>>> nobody is interested in these new features ? >>> Is this ZFS-style recursive snapshotting? If yes, i am interested, and >>> thanks for your great work :) >> No it is not equal. My recursive snapshotting is not atomic as the ZFS >> one; every subvolume snapshot is atomic, but each snapshot is taken at >> different time. > For my use case that is not a problem, but others may disagree
Unfortunately an atomic-and-recursive snapshot is not feasible from user space. Hoping that this patch will be accepted in mainline. >> >> BR >> G.Baroncelli >> >>>> On 2013-11-16 18:09, Goffredo Baroncelli wrote: >>>>> Hi All, >>>>> >>>>> the following patches implement the recursively snapshotting and >>>>> deleting of a subvolume. >>>>> >>>>> To snapshot recursively you must pass the -R switch: >>>>> >>>>> # btrfs subvolume create sub1 >>>>> Create subvolume './sub1' >>>>> # btrfs subvolume create sub1/sub2 >>>>> Create subvolume 'sub1/sub2' >>>>> >>>>> # btrfs subvolume snapshot -R sub1 sub1-snap >>>>> Create a snapshot of 'sub1' in './sub1-snap' >>>>> Create a snapshot of 'sub1/sub2' in './sub1-snap/sub2' >>>>> >>>>> To recursively delete subvolumes, you must pass the switch '-R': >>>>> >>>>> # btrfs subvolume create sub1 >>>>> Create subvolume './sub1' >>>>> # btrfs subvolume create sub1/sub2 >>>>> Create subvolume 'sub1/sub2' >>>>> >>>>> # btrfs subvolume delete -R sub1 >>>>> Delete subvolume '/root/sub1/sub2' >>>>> Delete subvolume '/root/sub1' >>>>> >>>>> >>>>> Some caveats: >>>>> 1) the recursively behaviour need the root capability >>>>> This because how the subvolume are discovered >>>>> >>>>> 2) it is not possible to recursively snapshot a subvolume >>>>> in read-only mode >>>>> This because when a subvolume is snapshotted, its >>>>> nested subvolumes appear as directory in the snapshot. >>>>> These directories are removed before snapshotting the >>>>> nested subvolumes. This is incompatible with a read >>>>> only subvolume. >>>>> >>>>> BR >>>>> G.Baroncelli >>>>> >>>>> -- >>>>> To unsubscribe from this list: send the line "unsubscribe >>>>> linux-btrfs" in >>>>> the body of a message to majord...@vger.kernel.org >>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>>> >>> -- >>> To unsubscribe from this list: send the line "unsubscribe >>> linux-btrfs" in >>> the body of a message to majord...@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >> > > -- gpg @keyserver.linux.it: Goffredo Baroncelli (kreijackATinwind.it> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
