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installation: zfs: add advanced zfs configuration section

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Copied from pve-docs, applies the same for the PMG installer.

Signed-off-by: Christoph Heiss <c.heiss@proxmox.com>
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Christoph Heiss 2024-11-29 14:05:42 +01:00 committed by Thomas Lamprecht
parent c5bdf53917
commit 59fbee4e6e
1 changed files with 35 additions and 1 deletions
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pmg-installation.adoc
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@ -133,7 +133,7 @@ restrict LVM space (see xref:advanced_lvm_options[below]).
{pmg} can also be installed on ZFS. As ZFS offers several software RAID levels,
this is an option for systems that don't have a hardware RAID controller. The
target disks must be selected in the `Options` dialog. More ZFS specific
settings can be changed under `Advanced Options`.
settings can be changed under xref:advanced_zfs_options[`Advanced Options`].
WARNING: ZFS on top of any hardware RAID is not supported and can result in data
loss.
@ -278,6 +278,40 @@ Defines the amount of free space that should be left in the LVM volume group
NOTE: LVM requires free space in the VG for snapshot creation (not
required for lvmthin snapshots).
[[advanced_zfs_options]]
Advanced ZFS Configuration Options
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The installer creates the ZFS pool `rpool`, if ZFS is used. No swap space is
created but you can reserve some unpartitioned space on the install disks for
swap. You can also create a swap zvol after the installation, although this can
lead to problems.
`ashift`::
Defines the `ashift` value for the created pool. The `ashift` needs to be set at
least to the sector-size of the underlying disks (2 to the power of `ashift` is
the sector-size), or any disk which might be put in the pool (for example the
replacement of a defective disk).
`compress`::
Defines whether compression is enabled for `rpool`.
`checksum`::
Defines which checksumming algorithm should be used for `rpool`.
`copies`::
Defines the `copies` parameter for `rpool`. Check the `zfs(8)` manpage for the
semantics, and why this does not replace redundancy on disk-level.
`hdsize`::
Defines the total hard disk size to be used. This is useful to save free space
on the hard disk(s) for further partitioning (for example to create a
swap-partition). `hdsize` is only honored for bootable disks, that is only the
first disk or mirror for RAID0, RAID1 or RAID10, and all disks in RAID-Z[123].
ZFS Performance Tips
~~~~~~~~~~~~~~~~~~~~