zfs get compression zfs get compression /rpool zfs get compressratio zfs get compressratio /rpool zfs get compression,compressratio,used,logicalused,referenced,logicalreferenced rpool/data/subvol-118-disk-0
From OpenZFS 2.0.0 there is support for ZSTD:
zpool get all | grep compr nvmpool feature@lz4_compress active local nvmpool feature@zstd_compress disabled local rpool feature@lz4_compress active local rpool feature@zstd_compress disabled local zfs get all rpool | grep compr rpool compressratio 1.16x - rpool compression on local rpool refcompressratio 1.00x -
zfs set compression=zstd rpool/data cannot set property for 'rpool/data': pool and or dataset must be upgraded to set this property or value