ZFS - Filesystems - Set Properties for a Filesystem

Many Properties can be set.

Compression

sudo zfs set compression=on testpool/projects

NOTE: The default Compression is lz4.

The compression level can be changed if required:

sudo zfs set compression=gzip-9 testpool

The compression type can be changed too:

sudo zfs set compression=lz4 testpool

The compression level can be checked:

sudo zfs get compressratio

Ditto blocks create more redundant copies of data to copy, just for more added redundancy.

With a storage pool of just one device, ditto blocks are spread across the device, trying to place the blocks at least 1/8 of the disk apart.
With multiple devices in a pool, ZFS tries to spread ditto blocks across separate VDEVs.
1 to 3 copies can be can be set.

sudo zfs set copies=3 testpool/projects

NOTE: This sets 3 copies on testpool/projects.

ZFS dedup will discard blocks that are identical to existing blocks and will instead use a reference to the existing block.

sudo zfs set dedup=on testpool/projects

NOTE: There are pros and cons to deduping.

zfs set mountpoint=/test testpool/projects
df -h |grep /test

sudo zfs set quota=10G testpool/projects

NOTE: This sets a maximum quota of 10 gigabytes.

sudo zfs set reservation=200m testpool/tmp

NOTE: This much space is reserved for the Filesystem.