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My stack at the moment is 6x [10 TB WD Red Pros -> dm-integrity] -> mdadm raid6 -> dm-crypt -> LVM. One of my LVM volumes is btrfs. I only use LVM because I've
by Teknoman117 6y ago
My stack at the moment is 6x [10 TB WD Red Pros -> dm-integrity] -> mdadm raid6 -> dm-crypt -> LVM. One of my LVM volumes is btrfs. I only use LVM because I've had terrible performance for VM images stored in btrfs volumes. You can always use fallocate and disable CoW for the image but that prevents taking snapshots.
I'd if there was a zvol equivalent in btrfs.
- cmurf 6y agoNeither fallocate nor nodatacow will prevent taking snapshots. The result of writing to nodatacow shared extents is that the write must be COW, not an overwrite. Same as a reflink copy of a file on XFS. New "overwrites" are COW, subsequent overwrites are in fact overwrites.
- deleted 6y ago[deleted]