This seems to store the zfs send stream. That's a bad idea.
> Incremental ZFS send streams do not have any of these properties and full ZFS send streams only have a few of them. Neither full nor incremental streams have any resilience against damage to the stream; a stream is either entirely intact or it's useless. Neither has selective restores or readily available indexes. Incremental streams are completely useless without everything they're based on. All of these issues will sooner or later cause you pain if you use ZFS streams as a backup format.
> Incremental ZFS send streams do not have any of these properties and full ZFS send streams only have a few of them. Neither full nor incremental streams have any resilience against damage to the stream; a stream is either entirely intact or it's useless. Neither has selective restores or readily available indexes. Incremental streams are completely useless without everything they're based on. All of these issues will sooner or later cause you pain if you use ZFS streams as a backup format.
https://utcc.utoronto.ca/~cks/space/blog/solaris/ZFSSendNotA...