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Homelab/host_init/zfs.md

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// Write me a cheatsheet for ZFS

ZFS Cheatsheet

Command Description
zpool status Show status of zpools
zpool import ssd Import an existing zpool named ssd
zpool create ssd /dev/sda Create a zpool named ssd with a single disk /dev/sda
zfs list Show some metadata of zpools
zfs create ssd/mydataset Create a dataset named mydataset in the zpool ssd
zfs set compression=lz4 ssd/mydataset Set compression to lz4 for the dataset mydataset in the zpool ssd
zfs destroy ssd/mydataset Delete a dataset named mydataset in the zpool ssd

IMPORTANT: If you want to use a ZFS Dataset as a host volume for a nomad job, you will need to set permissions for docker to have read and write access by running chown 70 /zpool/dataset/path on the host.

Notes

  • ZFS is a file system and logical volume manager that is scalable, includes data integrity, and has a lot of features for managing storage.

  • zpool is the command for managing storage pools and zfs is the command for managing datasets. Datasets exist within storage pools.

  • ZFS has a lot of features such as compression, deduplication, snapshots, and clones.

  • ZFS is a good choice for managing storage on a single host but it is not a distributed file system. If you need a distributed file system, you should look into Ceph or Seaweedfs.