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104 lines
2.3 KiB
Plaintext
104 lines
2.3 KiB
Plaintext
Local ZFS Pool Backend
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----------------------
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include::attributes.txt[]
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ifdef::wiki[]
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:pve-toplevel:
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:title: Storage: ZFS
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endif::wiki[]
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Storage pool type: `zfspool`
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This backend allows you to access local ZFS pools (or ZFS file systems
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inside such pools).
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Configuration
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~~~~~~~~~~~~~
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The backend supports the common storage properties `content`, `nodes`,
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`disable`, and the following ZFS specific properties:
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pool::
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Select the ZFS pool/filesystem. All allocations are done within that
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pool.
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blocksize::
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Set ZFS blocksize parameter.
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sparse::
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Use ZFS thin-provisioning. A sparse volume is a volume whose
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reservation is not equal to the volume size.
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.Configuration Example (`/etc/pve/storage.cfg`)
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----
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zfspool: vmdata
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pool tank/vmdata
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content rootdir,images
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sparse
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----
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File naming conventions
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~~~~~~~~~~~~~~~~~~~~~~~
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The backend uses the following naming scheme for VM images:
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vm-<VMID>-<NAME> // normal VM images
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base-<VMID>-<NAME> // template VM image (read-only)
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subvol-<VMID>-<NAME> // subvolumes (ZFS filesystem for containers)
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`<VMID>`::
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This specifies the owner VM.
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`<NAME>`::
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This can be an arbitrary name (`ascii`) without white space. The
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backend uses `disk[N]` as default, where `[N]` is replaced by an
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integer to make the name unique.
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Storage Features
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~~~~~~~~~~~~~~~~
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ZFS is probably the most advanced storage type regarding snapshot and
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cloning. The backend uses ZFS datasets for both VM images (format
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`raw`) and container data (format `subvol`). ZFS properties are
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inherited from the parent dataset, so you can simply set defaults
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on the parent dataset.
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.Storage features for backend `zfs`
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[width="100%",cols="m,m,3*d",options="header"]
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|==============================================================================
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|Content types |Image formats |Shared |Snapshots |Clones
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|images rootdir |raw subvol |no |yes |yes
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|==============================================================================
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Examples
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~~~~~~~~
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It is recommended to create an extra ZFS file system to store your VM images:
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# zfs create tank/vmdata
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To enable compression on that newly allocated file system:
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# zfs set compression=on tank/vmdata
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You can get a list of available ZFS filesystems with:
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# pvesm zfsscan
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ifdef::wiki[]
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See Also
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~~~~~~~~
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* link:/wiki/Storage[Storage]
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endif::wiki[]
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