What are available solutions for block level or more detailed deduplication ?There are file-based ones - with Copy-On-Write approach.I'm looking for block level copy-on-write, so I could periodically look for common blocks, or - preferably - parts of files, merge them and flag for CoW use manner.Is there something like this available, or does it still need to be created ?I am not sure if Btrfs deduplication is block/file/subpart level ?There is LessFS, but I'am not sure what level of deduplication does it provide ? Maybe other solution?
Deduplication on partition level
filesystems;deduplication