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Can you implement COW filesystems without some kind of checksumming? Or have I been in ZFS-land for too long?
by kchoudhu 10y ago
Can you implement COW filesystems without some kind of checksumming? Or have I been in ZFS-land for too long?
- Freaky 10y agoYup. Nothing intrinsic to it that needs checksums. zfs set checksum=off rpool
- usefulcat 10y agoSure, just assume that there's no such thing as bit rot.
- madgar 10y agoI think you're mixing up checksumming and content-addressing.
- cmurf 10y agoYes, what's more difficult is implementing data checksumming without CoW. What you may not be used to in ZFS is a nodatacow option (per file or per filesystem) which does exist on Btrfs and it implies nodatasum (no checksums for data, metadata is still always checksummed and cow). Conversely, nodatasum does not imply nodatacow.