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The problem is when you have systems that don't have ZFS, or cases where you want to operate on an image without mounting it. Also (from memory) ZFS de-duplica

by cyphar 8y ago

The problem is when you have systems that don't have ZFS, or cases where you want to operate on an image without mounting it. Also (from memory) ZFS de-duplication is not transmitted over zfs-send which means that you don't really get ZFS's de-dup when transferring (you do get it for snapshots -- but then we're back to layer de-duplication which is busted when it comes to containers). Don't get me wrong, I'm a huge fan of ZFS but it really doesn't solve all the problems I went through.

waz0wski 8y ago
ZFS supports both compression and de-duplication on send streams, the behavior on the receiving side depends on the configuration of the pool+dataset where the data is being received. There used to be some differences in features/behavior depending on the ZFS version in use (Solaris vs FreeBSD vs ZFSoL/OpenZFS) but I believe as of 2018 all ZFS implementations have these features for send streams