On 06/29/2015 11:35 AM, David Weber wrote:
we are testing Btrfs as a kvm storage system with "defaults,space_cache,nodatacow" mount options and regular snapshots.
That sounds brave - even with "nodatacow" it appeared to me that using btrfs with often partially overwritten files like VM images results in excessively fragmented files. And taking snapshots kind of counteracts "nodatacow". What does "filefrag" tell about your VM images on btrfs? (As much as I like btrfs for other purposes, I currently stay with XFS for VM images, database files and alike.) Regards, Lutz Vieweg -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
