From: Nicolas Frey <n.frey@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [PATCH pve-docs v2 1/1] ceph: add warning about mixing CRUSH rules with and without device classes when using autoscaler
Date: Wed, 22 Apr 2026 09:54:40 +0200 [thread overview]
Message-ID: <20260422075440.20996-1-n.frey@proxmox.com> (raw)
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
next reply other threads:[~2026-04-22 7:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-22 7:54 Nicolas Frey [this message]
2026-04-22 8:19 ` Kefu Chai
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