[OpenIndiana-discuss] zpool feature/upgrade best practices or recommendations

[John D Groenveld]

In message <bda56ae5-ef0e-d05a-08de-7aecc8abe183 at ndsu.edu>, Tim Mooney via open
indiana-discuss writes:
>I'm not sure how lz4_compress or empty_bpobj were set to "active", as I have
>no record of doing anything with either.

You can validate your records via zpool history -il rpool.

The lz4_compress feature controls whether lz4 is available.

compression is a dataset property, see zfs(8)
<URL:https://illumos.org/man/8/zfs>
     compression=on|off|gzip|gzip-N|lz4|lzjb|zle
       Controls the compression algorithm used for this dataset.

       Setting compression to on 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 default
       compression algorithm is either lzjb or, if the lz4_compress feature is
       enabled, lz4.

John
groenveld at acm.org