Storage – ZFS Create

     compression=on|off|gzip|gzip-N|lz4|lzjb|zle|zstd|zstd-N|zstd-fast|zstd-fast-N
       Controls the compression algorithm used for this dataset.

       When set to on (the default), indicates that the current default compression algorithm should be used.  The default balances compression and decompression
       speed, with compression ratio and is expected to work well on a wide variety of workloads.  Unlike all other settings for this property, on does not select a
       fixed compression type.  As new compression algorithms are added to ZFS and enabled on a pool, the default compression algorithm may change.  The current de‐
       fault compression algorithm is either lzjb or, if the lz4_compress feature is enabled, lz4.

       The lz4 compression algorithm is a high-performance replacement for the lzjb algorithm.  It features significantly faster compression and decompression, as well
       as a moderately higher compression ratio than lzjb, but can only be used on pools with the lz4_compress feature set to enabled.  See zpool-features(7) for de‐
       tails on ZFS feature flags and the lz4_compress feature.

       The lzjb compression algorithm is optimized for performance while providing decent data compression.

       The gzip compression algorithm uses the same compression as the gzip(1) command.  You can specify the gzip level by using the value gzip-N, where N is an inte‐
       ger from 1 (fastest) to 9 (best compression ratio).  Currently, gzip is equivalent to gzip-6 (which is also the default for gzip(1)).

       The zstd compression algorithm provides both high compression ratios and good performance.  You can specify the zstd level by using the value zstd-N, where N is
       an integer from 1 (fastest) to 19 (best compression ratio).  zstd is equivalent to zstd-3.

       Faster speeds at the cost of the compression ratio can be requested by setting a negative zstd level.  This is done using zstd-fast-N, where N is an integer in
       [1-10, 20, 30, …, 100, 500, 1000] which maps to a negative zstd level.  The lower the level the faster the compression — 1000 provides the fastest compression
       and lowest compression ratio.  zstd-fast is equivalent to zstd-fast-1.

       The zle compression algorithm compresses runs of zeros.

       This property can also be referred to by its shortened column name compress.  Changing this property affects only newly-written data.

       When any setting except off is selected, compression will explicitly check for blocks consisting of only zeroes (the NUL byte).  When a zero-filled block is de‐
       tected, it is stored as a hole and not compressed using the indicated compression algorithm.

       Any block being compressed must be no larger than 7/8 of its original size after compression, otherwise the compression will not be considered worthwhile and
       the block saved uncompressed.  Note that when the logical block is less than 8 times the disk sector size this effectively reduces the necessary compression ra‐
       tio; for example, 8 KiB blocks on disks with 4 KiB disk sectors must compress to 1/2 or less of their original size.

     compression=on|off|gzip|gzip-N|lz4|lzjb|zle|zstd|zstd-N|zstd-fast|zstd-fast-N

       Controls the compression algorithm used for this dataset.

​

       When set to on (the default), indicates that the current default compression algorithm should be used.  The default balances compression and decompression

       speed, with compression ratio and is expected to work well on a wide variety of workloads.  Unlike all other settings for this property, on does not select a

       fixed compression type.  As new compression algorithms are added to ZFS and enabled on a pool, the default compression algorithm may change.  The current de‐

       fault compression algorithm is either lzjb or, if the lz4_compress feature is enabled, lz4.

​

       The lz4 compression algorithm is a high-performance replacement for the lzjb algorithm.  It features significantly faster compression and decompression, as well

       as a moderately higher compression ratio than lzjb, but can only be used on pools with the lz4_compress feature set to enabled.  See zpool-features(7) for de‐

       tails on ZFS feature flags and the lz4_compress feature.

​

       The lzjb compression algorithm is optimized for performance while providing decent data compression.

​

       The gzip compression algorithm uses the same compression as the gzip(1) command.  You can specify the gzip level by using the value gzip-N, where N is an inte‐

       ger from 1 (fastest) to 9 (best compression ratio).  Currently, gzip is equivalent to gzip-6 (which is also the default for gzip(1)).

​

       The zstd compression algorithm provides both high compression ratios and good performance.  You can specify the zstd level by using the value zstd-N, where N is

       an integer from 1 (fastest) to 19 (best compression ratio).  zstd is equivalent to zstd-3.

​

       Faster speeds at the cost of the compression ratio can be requested by setting a negative zstd level.  This is done using zstd-fast-N, where N is an integer in

       [1-10, 20, 30, …, 100, 500, 1000] which maps to a negative zstd level.  The lower the level the faster the compression — 1000 provides the fastest compression

       and lowest compression ratio.  zstd-fast is equivalent to zstd-fast-1.

​

       The zle compression algorithm compresses runs of zeros.

​

       This property can also be referred to by its shortened column name compress.  Changing this property affects only newly-written data.

​

       When any setting except off is selected, compression will explicitly check for blocks consisting of only zeroes (the NUL byte).  When a zero-filled block is de‐

       tected, it is stored as a hole and not compressed using the indicated compression algorithm.

​

       Any block being compressed must be no larger than 7/8 of its original size after compression, otherwise the compression will not be considered worthwhile and

       the block saved uncompressed.  Note that when the logical block is less than 8 times the disk sector size this effectively reduces the necessary compression ra‐

       tio; for example, 8 KiB blocks on disks with 4 KiB disk sectors must compress to 1/2 or less of their original size.

root@pve-01:~# zpool get feature@lz4_compress RAIDZ2
NAME    PROPERTY              VALUE                 SOURCE
RAIDZ2  feature@lz4_compress  active                local
root@pve-01:~#

root@pve-01:~# zpool get feature@lz4_compress RAIDZ2

NAME    PROPERTY              VALUE                 SOURCE

RAIDZ2  feature@lz4_compress  active                local

root@pve-01:~#