ZFS Cheatsheet [weichbrodt.me]

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====== ZFS Cheatsheet ======

=== Create a pool ===

   * Get disk ids from ''/dev/disk/by-id'', do not use ''/dev/sdX''
   * ''zpool create <name> <type> <disks>''
   * Example: ''zpool create ssds mirror nvme-Samsung_SSD_980_TB_ABCD nvme-Samsung_SSD_980_TB_EFGH''
   * Don't set ''ashift'', let zfs figure it out. You can check with ''zdb -C <pool>'' what value it uses.
      * Only set it, if it's wrong. ''ashift=12'' for 4K physical sectors
   * Set ''autotrim=on'' for SSDs
   * When creating a pool ''-o'' is for pool options. To pass options to the root dataset, use ''-O''.

=== Create a dataset ===

   * ''zfs create <pool>/<dataset>''
   * Disabling ''atime'' is no longer necessary, just make sure that both ''atime'' and ''relatime'' are ''on''
   * For encryption specify: ''-o encryption=on -o keyformat=raw -o keylocation=file:/%%//%%path/to/key''
   * Enable comporession: ''-o compression=zstd''
   * ''recordsize'' of 128K is default. When storing large files, e.g., media, set this higher, e.g., 1M
   *