Re: [PATCH pve-docs v2 1/1] ceph: add warning about mixing CRUSH rules with and without device classes when using autoscaler

[Kefu Chai <k.chai@proxmox.com>]

Nicolas Frey <n.frey@proxmox.com> writes:

> Suggested-by: Friedrich Weber <f.weber@proxmox.com>
> Signed-off-by: Nicolas Frey <n.frey@proxmox.com>
> ---
> Changes since v1 (thanks Kefu!):
> * Use Ceph's terminology for CRUSH rules with device classes
> * adjust phrasing, as the autoscaler still scales on non-overlapping
>     pools
>
>  pveceph.adoc | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/pveceph.adoc b/pveceph.adoc
> index 2aae6d6..b41bac9 100644
> --- a/pveceph.adoc
> +++ b/pveceph.adoc
> @@ -916,6 +916,10 @@ TIP: If the pool already contains objects, these must be moved accordingly.
>  Depending on your setup, this may introduce a big performance impact on your
>  cluster. As an alternative, you can create a new pool and move disks separately.
>
> +WARNING: When using the PG autoscaler, all pools in the cluster are required to
> +use CRUSH rules of the same kind, either all specifying a device class,
> +or none. Otherwise the autoscaler will skip the affected
> +pools and their `pg_num` will not be adjusted.
>
>  Ceph Client
>  -----------
> --
> 2.47.3