From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <f.ebner@proxmox.com> Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id 89C669E402 for <pve-user@lists.proxmox.com>; Tue, 31 Oct 2023 10:20:45 +0100 (CET) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 6074918A98 for <pve-user@lists.proxmox.com>; Tue, 31 Oct 2023 10:20:45 +0100 (CET) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS for <pve-user@lists.proxmox.com>; Tue, 31 Oct 2023 10:20:44 +0100 (CET) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 13F3F42D16; Tue, 31 Oct 2023 10:20:44 +0100 (CET) Message-ID: <b9c5eb38-10cf-41eb-801d-dd1e801a7b61@proxmox.com> Date: Tue, 31 Oct 2023 10:20:33 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: pve-user@lists.proxmox.com, Bryan Fields <Bryan@bryanfields.net> References: <8bbed148-012b-cd0f-cf44-49f4e891464d@bryanfields.net> Content-Language: en-US From: Fiona Ebner <f.ebner@proxmox.com> In-Reply-To: <8bbed148-012b-cd0f-cf44-49f4e891464d@bryanfields.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL -0.080 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 SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record T_SCC_BODY_TEXT_LINE -0.01 - URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [proxmox.com] Subject: Re: [PVE-User] Shared ZFS storage that supports LXC's X-BeenThere: pve-user@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE user list <pve-user.lists.proxmox.com> List-Unsubscribe: <https://lists.proxmox.com/cgi-bin/mailman/options/pve-user>, <mailto:pve-user-request@lists.proxmox.com?subject=unsubscribe> List-Archive: <http://lists.proxmox.com/pipermail/pve-user/> List-Post: <mailto:pve-user@lists.proxmox.com> List-Help: <mailto:pve-user-request@lists.proxmox.com?subject=help> List-Subscribe: <https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-user>, <mailto:pve-user-request@lists.proxmox.com?subject=subscribe> X-List-Received-Date: Tue, 31 Oct 2023 09:20:45 -0000 Hi, Am 29.10.23 um 11:16 schrieb Bryan Fields: > I do get a warning in proxmox when moving a VM into it or making a > snapshot: > Warning: volblocksize (8192) is much less than the minimum allocation > unit (32768), which wastes at least 75% of space. To reduce wasted space, > use a larger volblocksize (32768 is recommended), fewer dRAID data disks > per group, or smaller sector size (ashift). > > I can't find exactly what this is referring to or how to fix it. Does > anyone have insight into this message? > You can set the default blocksize in the storage configuration in Proxmox VE, either in the UI (Block Size option) or via 'pvesm set <your storage ID> --blocksize 32K'. Note that this will only apply to newly allocated or moved volumes and not change existing ones. > With the LXC's I've found they don't support this backend storage. (and > it's not mentioned in the docs) I assume this is do to them needing a > filesystem, not a block device. My option here would be to run NFS for > shared storage, but this loses the ability to do snapshots (a must > have). LVM would work, but it's not able to be shared. > It is documented via the content types (only 'images' for ZFS over iSCSI, but not 'rootdir'): https://pve.proxmox.com/pve-docs/chapter-pvesm.html#_common_storage_propertieshttps://pve.proxmox.com/pve-docs/chapter-pvesm.html#storage_zfs >From a quick glance, the only storage type that fits your needs, i.e. snapshots, shared and support for 'rootdir' content type is Ceph/RBD. Everything else requires workarounds and won't be fully integrated. Best Regards, Fiona