From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) by lore.proxmox.com (Postfix) with ESMTPS id E19C71FF13B for ; Wed, 22 Apr 2026 09:54:45 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 12568DFA8; Wed, 22 Apr 2026 09:54:45 +0200 (CEST) From: Nicolas Frey 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 Message-ID: <20260422075440.20996-1-n.frey@proxmox.com> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL -0.114 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment KAM_LAZY_DOMAIN_SECURITY 1 Sending domain does not have any anti-forgery methods RDNS_NONE 0.793 Delivered to internal network by a host with no rDNS SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_NONE 0.001 SPF: sender does not publish an SPF Record Message-ID-Hash: TIBPBXUFQMYQBYGKSTHPKJIPIVUUOFLM X-Message-ID-Hash: TIBPBXUFQMYQBYGKSTHPKJIPIVUUOFLM X-MailFrom: nfrey@miso.proxmox.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: Proxmox VE development discussion List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Suggested-by: Friedrich Weber Signed-off-by: Nicolas Frey --- 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