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It sounds like the author is using ZFS encryption.

If that's the case, then doing so with replicated ZFS snapshots is probably not a good idea.

That specific scenario (ZFS encryption -> replication of encrypted snapshots) is a known cause of ZFS corruption. :(

https://www.phoronix.com/news/OpenZFS-Encrypt-Corrupt

Unfortunately it doesn't seem to be widely known about, though there is a suggestion to make it official:

https://github.com/openzfs/openzfs-docs/issues/494



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